citing your sources in a research paper

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How to Cite Sources

Here is a complete list for how to cite sources. Most of these guides present citation guidance and examples in MLA, APA, and Chicago.

If you’re looking for general information on MLA or APA citations , the EasyBib Writing Center was designed for you! It has articles on what’s needed in an MLA in-text citation , how to format an APA paper, what an MLA annotated bibliography is, making an MLA works cited page, and much more!

MLA Format Citation Examples

The Modern Language Association created the MLA Style, currently in its 9th edition, to provide researchers with guidelines for writing and documenting scholarly borrowings.  Most often used in the humanities, MLA style (or MLA format ) has been adopted and used by numerous other disciplines, in multiple parts of the world.

MLA provides standard rules to follow so that most research papers are formatted in a similar manner. This makes it easier for readers to comprehend the information. The MLA in-text citation guidelines, MLA works cited standards, and MLA annotated bibliography instructions provide scholars with the information they need to properly cite sources in their research papers, articles, and assignments.

• Book Chapter
• Conference Paper
• Documentary
• Encyclopedia
• Google Images
• Kindle Book
• Memorial Inscription
• Museum Exhibit
• Painting or Artwork
• PowerPoint Presentation
• Sheet Music
• Thesis or Dissertation
• YouTube Video

APA Format Citation Examples

The American Psychological Association created the APA citation style in 1929 as a way to help psychologists, anthropologists, and even business managers establish one common way to cite sources and present content.

APA is used when citing sources for academic articles such as journals, and is intended to help readers better comprehend content, and to avoid language bias wherever possible. The APA style (or APA format ) is now in its 7th edition, and provides citation style guides for virtually any type of resource.

Chicago Style Citation Examples

The Chicago/Turabian style of citing sources is generally used when citing sources for humanities papers, and is best known for its requirement that writers place bibliographic citations at the bottom of a page (in Chicago-format footnotes ) or at the end of a paper (endnotes).

The Turabian and Chicago citation styles are almost identical, but the Turabian style is geared towards student published papers such as theses and dissertations, while the Chicago style provides guidelines for all types of publications. This is why you’ll commonly see Chicago style and Turabian style presented together. The Chicago Manual of Style is currently in its 17th edition, and Turabian’s A Manual for Writers of Research Papers, Theses, and Dissertations is in its 8th edition.

Citing Specific Sources or Events

• Declaration of Independence
• Gettysburg Address
• Martin Luther King Jr. Speech
• President Obama’s Farewell Address
• President Trump’s Inauguration Speech
• White House Press Briefing

Additional FAQs

• Citing Archived Contributors
• Citing a Blog
• Citing a Book Chapter
• Citing a Source in a Foreign Language
• Citing an Image
• Citing a Song
• Citing Special Contributors
• Citing a Translated Article
• Citing a Tweet

6 Interesting Citation Facts

The world of citations may seem cut and dry, but there’s more to them than just specific capitalization rules, MLA in-text citations , and other formatting specifications. Citations have been helping researches document their sources for hundreds of years, and are a great way to learn more about a particular subject area.

Ever wonder what sets all the different styles apart, or how they came to be in the first place? Read on for some interesting facts about citations!

1. There are Over 7,000 Different Citation Styles

You may be familiar with MLA and APA citation styles, but there are actually thousands of citation styles used for all different academic disciplines all across the world. Deciding which one to use can be difficult, so be sure to ask you instructor which one you should be using for your next paper.

2. Some Citation Styles are Named After People

While a majority of citation styles are named for the specific organizations that publish them (i.e. APA is published by the American Psychological Association, and MLA format is named for the Modern Language Association), some are actually named after individuals. The most well-known example of this is perhaps Turabian style, named for Kate L. Turabian, an American educator and writer. She developed this style as a condensed version of the Chicago Manual of Style in order to present a more concise set of rules to students.

3. There are Some Really Specific and Uniquely Named Citation Styles

How specific can citation styles get? The answer is very. For example, the “Flavour and Fragrance Journal” style is based on a bimonthly, peer-reviewed scientific journal published since 1985 by John Wiley & Sons. It publishes original research articles, reviews and special reports on all aspects of flavor and fragrance. Another example is “Nordic Pulp and Paper Research,” a style used by an international scientific magazine covering science and technology for the areas of wood or bio-mass constituents.

4. More citations were created on  EasyBib.com  in the first quarter of 2018 than there are people in California.

The US Census Bureau estimates that approximately 39.5 million people live in the state of California. Meanwhile, about 43 million citations were made on EasyBib from January to March of 2018. That’s a lot of citations.

5. “Citations” is a Word With a Long History

The word “citations” can be traced back literally thousands of years to the Latin word “citare” meaning “to summon, urge, call; put in sudden motion, call forward; rouse, excite.” The word then took on its more modern meaning and relevance to writing papers in the 1600s, where it became known as the “act of citing or quoting a passage from a book, etc.”

6. Citation Styles are Always Changing

The concept of citations always stays the same. It is a means of preventing plagiarism and demonstrating where you relied on outside sources. The specific style rules, however, can and do change regularly. For example, in 2018 alone, 46 new citation styles were introduced , and 106 updates were made to exiting styles. At EasyBib, we are always on the lookout for ways to improve our styles and opportunities to add new ones to our list.

Why Citations Matter

Here are the ways accurate citations can help your students achieve academic success, and how you can answer the dreaded question, “why should I cite my sources?”

They Give Credit to the Right People

Citing their sources makes sure that the reader can differentiate the student’s original thoughts from those of other researchers. Not only does this make sure that the sources they use receive proper credit for their work, it ensures that the student receives deserved recognition for their unique contributions to the topic. Whether the student is citing in MLA format , APA format , or any other style, citations serve as a natural way to place a student’s work in the broader context of the subject area, and serve as an easy way to gauge their commitment to the project.

They Provide Hard Evidence of Ideas

Having many citations from a wide variety of sources related to their idea means that the student is working on a well-researched and respected subject. Citing sources that back up their claim creates room for fact-checking and further research . And, if they can cite a few sources that have the converse opinion or idea, and then demonstrate to the reader why they believe that that viewpoint is wrong by again citing credible sources, the student is well on their way to winning over the reader and cementing their point of view.

They Promote Originality and Prevent Plagiarism

The point of research projects is not to regurgitate information that can already be found elsewhere. We have Google for that! What the student’s project should aim to do is promote an original idea or a spin on an existing idea, and use reliable sources to promote that idea. Copying or directly referencing a source without proper citation can lead to not only a poor grade, but accusations of academic dishonesty. By citing their sources regularly and accurately, students can easily avoid the trap of plagiarism , and promote further research on their topic.

They Create Better Researchers

By researching sources to back up and promote their ideas, students are becoming better researchers without even knowing it! Each time a new source is read or researched, the student is becoming more engaged with the project and is developing a deeper understanding of the subject area. Proper citations demonstrate a breadth of the student’s reading and dedication to the project itself. By creating citations, students are compelled to make connections between their sources and discern research patterns. Each time they complete this process, they are helping themselves become better researchers and writers overall.

When is the Right Time to Start Making Citations?

Make in-text/parenthetical citations as you need them.

As you are writing your paper, be sure to include references within the text that correspond with references in a works cited or bibliography. These are usually called in-text citations or parenthetical citations in MLA and APA formats. The most effective time to complete these is directly after you have made your reference to another source. For instance, after writing the line from Charles Dickens’ A Tale of Two Cities : “It was the best of times, it was the worst of times…,” you would include a citation like this (depending on your chosen citation style):

(Dickens 11).

This signals to the reader that you have referenced an outside source. What’s great about this system is that the in-text citations serve as a natural list for all of the citations you have made in your paper, which will make completing the works cited page a whole lot easier. After you are done writing, all that will be left for you to do is scan your paper for these references, and then build a works cited page that includes a citation for each one.

Need help creating an MLA works cited page ? Try the MLA format generator on EasyBib.com! We also have a guide on how to format an APA reference page .

2. Understand the General Formatting Rules of Your Citation Style Before You Start Writing

While reading up on paper formatting may not sound exciting, being aware of how your paper should look early on in the paper writing process is super important. Citation styles can dictate more than just the appearance of the citations themselves, but rather can impact the layout of your paper as a whole, with specific guidelines concerning margin width, title treatment, and even font size and spacing. Knowing how to organize your paper before you start writing will ensure that you do not receive a low grade for something as trivial as forgetting a hanging indent.

Don’t know where to start? Here’s a formatting guide on APA format .

3. Double-check All of Your Outside Sources for Relevance and Trustworthiness First

Collecting outside sources that support your research and specific topic is a critical step in writing an effective paper. But before you run to the library and grab the first 20 books you can lay your hands on, keep in mind that selecting a source to include in your paper should not be taken lightly. Before you proceed with using it to backup your ideas, run a quick Internet search for it and see if other scholars in your field have written about it as well. Check to see if there are book reviews about it or peer accolades. If you spot something that seems off to you, you may want to consider leaving it out of your work. Doing this before your start making citations can save you a ton of time in the long run.

Finished with your paper? It may be time to run it through a grammar and plagiarism checker , like the one offered by EasyBib Plus. If you’re just looking to brush up on the basics, our grammar guides  are ready anytime you are.

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Citation Basics

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A publication of the harvard college writing program.

Harvard Guide to Using Sources 

• The Honor Code
• Citing Sources

Citations provide information to help your audience locate the sources you consulted when writing a paper or preparing a presentation. Some of your instructors will specify which citation format you should use; others will tell you to choose your own citation format as long as you use it consistently. The most common citation formats are MLA (Modern Language Association) style, which is primarily used for papers in the humanities; APA (American Psychological Association) style, which is primarily used for papers in the social sciences; and Chicago style (The Chicago Manual of Style), which is used for both humanities and social science papers.

Some of your courses at Harvard will require you to use other citation formats. Some science courses may require you to use the citation style of the American Medical Association (AMA). AMA style is considered a standard citation format for academic writing in the sciences and is used in many textbooks and medical journals. The AMA Manual of Style is available online . The American Chemical Society publishes its own style guide , which you may be asked to use in chemistry courses. The Harvard Department of Economics provides students with a departmental style guide, which you can find  here . If you are not sure which format to use for a specific course, consult your instructor.

Both APA and MLA styles require you to credit your sources in two ways. First, you must include a parenthetical citation in the text of your paper that indicates the source of a particular quotation, paraphrased statement or idea, or fact; second, you must include a list of references at the end of your paper that enables readers to locate the sources you have used. You can read more about MLA style here and APA style here .

Chicago style also requires you to credit your sources both in the text and at the end of your paper. Chicago offers guidance on two types of in-text citations–notes or parenthetical citations. You can read more about Chicago style here .

If you have questions about which citation style to use, you should always check with your instructor.

• Citation Management Tools

PDFs for This Section

• Online Library and Citation Tools

Citing sources: Overview

• Citation style guides

Manage your references

Use these tools to help you organize and cite your references:

• Citation Management and Writing Tools

If you have questions after consulting this guide about how to cite, please contact your advisor/professor or the writing and communication center .

Why citing is important

It's important to cite sources you used in your research for several reasons:

• To show your reader you've done proper research by listing sources you used to get your information
• To be a responsible scholar by giving credit to other researchers and acknowledging their ideas
• To avoid plagiarism by quoting words and ideas used by other authors
• To allow your reader to track down the sources you used by citing them accurately in your paper by way of footnotes, a bibliography or reference list

About citations

Citing a source means that you show, within the body of your text, that you took words, ideas, figures, images, etc. from another place.

Citations are a short way to uniquely identify a published work (e.g. book, article, chapter, web site).  They are found in bibliographies and reference lists and are also collected in article and book databases.

Citations consist of standard elements, and contain all the information necessary to identify and track down publications, including:

• author name(s)
• titles of books, articles, and journals
• date of publication
• page numbers
• volume and issue numbers (for articles)

Citations may look different, depending on what is being cited and which style was used to create them. Choose an appropriate style guide for your needs.  Here is an example of an article citation using four different citation styles.  Notice the common elements as mentioned above:

Author - R. Langer

Article Title - New Methods of Drug Delivery

Source Title - Science

Volume and issue - Vol 249, issue 4976

Publication Date - 1990

Page numbers - 1527-1533

American Chemical Society (ACS) style:

Langer, R. New Methods of Drug Delivery. Science 1990 , 249 , 1527-1533.

IEEE Style:

R. Langer, " New Methods of Drug Delivery," Science , vol. 249 , pp. 1527-1533 , SEP 28, 1990 .

American Psychological Association   (APA) style:

Langer, R. (1990) . New methods of drug delivery. Science , 249 (4976), 1527-1533.

Modern Language Association (MLA) style:

Langer, R. " New Methods of Drug Delivery." Science 249.4976 (1990) : 1527-33.

What to cite

You must cite:

• Facts, figures, ideas, or other information that is not common knowledge

Publications that must be cited include:  books, book chapters, articles, web pages, theses, etc.

Another person's exact words should be quoted and cited to show proper credit 

When in doubt, be safe and cite your source!

Avoiding plagiarism

Plagiarism occurs when you borrow another's words (or ideas) and do not acknowledge that you have done so. In this culture, we consider our words and ideas intellectual property; like a car or any other possession, we believe our words belong to us and cannot be used without our permission.

Plagiarism is a very serious offense. If it is found that you have plagiarized -- deliberately or inadvertently -- you may face serious consequences. In some instances, plagiarism has meant that students have had to leave the institutions where they were studying.

The best way to avoid plagiarism is to cite your sources - both within the body of your paper and in a bibliography of sources you used at the end of your paper.

Some useful links about plagiarism:

• MIT Academic Integrity Overview on citing sources and avoiding plagiarism at MIT.
• Avoiding Plagiarism From the MIT Writing and Communication Center.
• Plagiarism: What It is and How to Recognize and Avoid It From Indiana University's Writing Tutorial Services.
• Plagiarism- Overview A resource from Purdue University.
• Next: Citation style guides >>
• Last Updated: Jan 16, 2024 7:02 AM
• URL: https://libguides.mit.edu/citing

University Library

Start your research.

• Research Process
• Find Background Info
• Find Sources through the Library
• Evaluate Your Info
• Cite Your Sources
• Evaluate, Write & Cite

• is the right thing to do  to give credit to those who had the idea
• shows that you have read and understand  what experts have had to say about your topic
• helps people find the sources  that you used in case they want to read more about the topic
• provides   evidence  for your arguments
• is professional and  standard practice   for students and scholars

What is a Citation?

A citation identifies for the reader the original source for an idea, information, or image that is referred to in a work.

• In the body of a paper, the  in-text citation  acknowledges the source of information used.
• At the end of a paper, the citations are compiled on a  References  or  Works Cited  list. A basic citation includes the author, title, and publication information of the source. 

From:  Lemieux  Library,  University  of Seattle 

Why Should You Cite?

Quoting Are you quoting two or more consecutive words from a source? Then the original source should be cited and the words or phrase placed in quotes. 

Paraphrasing If an idea or information comes from another source,  even if you put it in your own words , you still need to credit the source.  General vs. Unfamiliar Knowledge You do not need to cite material which is accepted common knowledge. If in doubt whether your information is common knowledge or not, cite it. Formats We usually think of books and articles. However, if you use material from web sites, films, music, graphs, tables, etc. you'll also need to cite these as well.

Plagiarism is presenting the words or ideas of someone else as your own without proper acknowledgment of the source. When you work on a research paper and use supporting material from works by others, it's okay to quote people and use their ideas, but you do need to correctly credit them. Even when you summarize or paraphrase information found in books, articles, or Web pages, you must acknowledge the original author.

Citation Style Help

Helpful links:

• MLA ,  Works Cited : A Quick Guide (a template of core elements)
• CSE  (Council of Science Editors)

For additional writing resources specific to styles listed here visit the  Purdue OWL Writing Lab

Citation and Bibliography Resources

• How to Write an Annotated Bibliography
• << Previous: Evaluate Your Info
• Next: Evaluate, Write & Cite >>

Creative Commons Attribution 3.0 License except where otherwise noted.

Land Acknowledgement

The land on which we gather is the unceded territory of the Awaswas-speaking Uypi Tribe. The Amah Mutsun Tribal Band, comprised of the descendants of indigenous people taken to missions Santa Cruz and San Juan Bautista during Spanish colonization of the Central Coast, is today working hard to restore traditional stewardship practices on these lands and heal from historical trauma.

The land acknowledgement used at UC Santa Cruz was developed in partnership with the Amah Mutsun Tribal Band Chairman and the Amah Mutsun Relearning Program at the UCSC Arboretum .

• Directories
• What are citations and why should I use them?
• When should I use a citation?
• Why are there so many citation styles?
• Which citation style should I use?
• Chicago Notes Style
• Chicago Author-Date Style
• AMA Style (medicine)
• Bluebook (law)
• Additional Citation Styles
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• Citing Sources

Citing Sources: What are citations and why should I use them?

What is a citation.

Citations are a way of giving credit when certain material in your work came from another source. It also gives your readers the information necessary to find that source again-- it provides an important roadmap to your research process. Whenever you use sources such as books, journals or websites in your research, you must give credit to the original author by citing the source. 

Why do researchers cite?

Scholarship is a conversation  and scholars use citations not only to  give credit  to original creators and thinkers, but also to  add strength and authority  to their own work.  By citing their sources, scholars are  placing their work in a specific context  to show where they “fit” within the larger conversation.  Citations are also a great way to  leave a trail  intended to help others who may want to explore the conversation or use the sources in their own work.

In short, citations

(1) give credit

(2) add strength and authority to your work

(3) place your work in a specific context

(4) leave a trail for other scholars

"Good citations should reveal your sources, not conceal them. They should honeslty reflect the research you conducted." (Lipson 4)

Lipson, Charles. "Why Cite?"  Cite Right: A Quick Guide to Citation Styles--MLA, APA, Chicago, the Sciences, Professions, and More . Chicago: U of Chicago, 2006. Print.

What does a citation look like?

Different subject disciplines call for citation information to be written in very specific order, capitalization, and punctuation. There are therefore many different style formats. Three popular citation formats are MLA Style (for humanities articles) and APA or Chicago (for social sciences articles).

MLA style (print journal article):  

Whisenant, Warren A. "How Women Have Fared as Interscholastic Athletic Administrators Since the Passage of Title IX." Sex Roles Vol. 49.3 (2003): 179-182.

APA style (print journal article):

Whisenant, W. A. (2003) How Women Have Fared as Interscholastic Athletic Administrators Since the Passage of Title IX. Sex Roles , 49 (3), 179-182.

Chicago style (print journal article):

Whisenant, Warren A. "How Women Have Fared as Interscholastic Athletic Administrators Since the Passage of Title IX." Sex Roles 49, no. 3 (2003): 179-182.

No matter which style you use, all citations require the same basic information:

• Author or Creator
• Container (e.g., Journal or magazine, website, edited book)
• Date of creation or publication
• Publisher 

You are most likely to have easy access to all of your citation information when you find it in the first place. Take note of this information up front, and it will be much easier to cite it effectively later.

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• Next: When should I use a citation? >>
• Last Updated: May 1, 2024 12:48 PM
• URL: https://guides.lib.uw.edu/research/citations

Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

Research and Citation Resources

Welcome to the Purdue OWL

This page is brought to you by the OWL at Purdue University. When printing this page, you must include the entire legal notice.

Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

If you are having trouble locating a specific resource please visit the  search page  or the  Site Map . The Citation Chart  provides a detailed overview of MLA Style, APA Style, and Chicago Manual of Style source documentation by category.

Conducting Research

These OWL resources will help you conduct research using primary source methods, such as interviews and observations, and secondary source methods, such as books, journals, and the Internet. This area also includes materials on evaluating research sources.

Using Research

These OWL resources will help you use the research you have conducted in your documents. This area includes material on quoting and paraphrasing your research sources, as well as material on how to avoid plagiarism.

APA Style (7th Edition)

These OWL resources will help you learn how to use the American Psychological Association (APA) citation and format style. This section contains resources on in-text citation and the References page, as well as APA sample papers, slide presentations, and the APA classroom poster.

These OWL resources will help you learn how to use the Modern Language Association (MLA) citation and format style. This section contains resources on in-text citation and the Works Cited page, as well as MLA sample papers, slide presentations, and the MLA classroom poster

Chicago Manual of Style

This section contains information on the Chicago Manual of Style method of document formatting and citation. These resources follow the 17th edition of the Chicago Manual of Style, which was issued in 2017.

Institute of Electrical and Electronics Engineers (IEEE) Style

These resources describe how to structure papers, cite sources, format references, and handle the complexities of tables and figures according to the latest Institute of Electrical and Electronics Engineers (IEEE) guidelines.

American Medical Association (AMA) Style

These resources provide guidance on how to cite sources using American Medical Association (AMA) Style, 10th Ed., including examples for print and electronic sources.

Research Overview

We live in an age overflowing with sources of information. With so many information sources at our fingertips, knowing where to start, sorting through it all and finding what we want can be overwhelming! This handout provides answers to the following research-related questions: Where do I begin? Where should I look for information? What types of sources are available?

Conducting Primary Research

Primary research involves collecting data about a given subject directly from the real world. This section includes information on what primary research is, how to get started, ethics involved with primary research and different types of research you can do. It includes details about interviews, surveys, observations, and analysis.

Evaluating Sources of Information

Evaluating sources of information is an important step in any research activity. This section provides information on evaluating bibliographic citations, aspects of evaluation, reading evaluation, print vs. online sources, and evaluating Internet sources.

Searching Online

This section covers finding information online. It includes information about search engines, Boolean operators, Web directories, and the invisible Web. It also includes an extensive, annotated links section.

Internet References

This page contains links and short descriptions of writing resources including dictionaries, style manuals, grammar handbooks, and editing resources. It also contains a list of online reference sites, indexes for writers, online libraries, books and e-texts, as well as links to newspapers, news services, journals, and online magazines.

Archival Research

This resource discusses conducting research in a variety of archives. It also discusses a number of considerations and best practices for conducting archival research.

This resources was developed in consultation with Purdue University Virginia Kelly Karnes Archives and Special Collections staff.

• USC Libraries
• Research Guides

Organizing Your Social Sciences Research Paper

• 11. Citing Sources
• Purpose of Guide
• Design Flaws to Avoid
• Independent and Dependent Variables
• Glossary of Research Terms
• Reading Research Effectively
• Narrowing a Topic Idea
• Broadening a Topic Idea
• Extending the Timeliness of a Topic Idea
• Academic Writing Style
• Applying Critical Thinking
• Choosing a Title
• Making an Outline
• Paragraph Development
• Research Process Video Series
• Executive Summary
• The C.A.R.S. Model
• Background Information
• The Research Problem/Question
• Theoretical Framework
• Citation Tracking
• Content Alert Services
• Evaluating Sources
• Primary Sources
• Secondary Sources
• Tiertiary Sources
• Scholarly vs. Popular Publications
• Qualitative Methods
• Quantitative Methods
• Insiderness
• Using Non-Textual Elements
• Limitations of the Study
• Common Grammar Mistakes
• Writing Concisely
• Avoiding Plagiarism
• Footnotes or Endnotes?
• Further Readings
• Generative AI and Writing
• USC Libraries Tutorials and Other Guides
• Bibliography

A citation is a formal reference to a published or unpublished source that you consulted and obtained information from while writing your research paper. It refers to a source of information that supports a factual statement, proposition, argument, or assertion or any quoted text obtained from a book, article, web site, or any other type of material . In-text citations are embedded within the body of your paper and use a shorthand notation style that refers to a complete description of the item at the end of the paper. Materials cited at the end of a paper may be listed under the heading References, Sources, Works Cited, or Bibliography. Rules on how to properly cite a source depends on the writing style manual your professor wants you to use for the class [e.g., APA, MLA, Chicago, Turabian, etc.]. Note that some disciplines have their own citation rules [e.g., law].

Citations: Overview. OASIS Writing Center, Walden University; Research and Citation. The Writing Lab and The OWL. Purdue University; Citing Sources. University Writing Center, Texas A&M University.

Citing Your Sources

Reasons for Citing Sources in Your Research Paper

English scientist, Sir Isaac Newton, once wrote, "If I have seen further, it is by standing on the shoulders of giants.”* Citations support learning how to "see further" through processes of intellectual discovery, critical thinking, and applying a deliberate method of navigating through the scholarly landscape by tracking how cited works are propagated by scholars over time and the subsequent ways this leads to the devarication of new knowledge.

Listed below are specific reasons why citing sources is an important part of doing good research.

• Shows the reader where to find more information . Citations help readers expand their understanding and knowledge about the issues being investigated. One of the most effective strategies for locating authoritative, relevant sources about a research problem is to review materials cited in studies published by other authors. In this way, the sources you cite help the reader identify where to go to examine the topic in more depth and detail.
• Increases your credibility as an author . Citations to the words, ideas, and arguments of scholars demonstrates that you have conducted a thorough review of the literature and, therefore, you are reporting your research results or proposing recommended courses of action from an informed and critically engaged perspective. Your citations offer evidence that you effectively contemplated, evaluated, and synthesized sources of information in relation to your conceptualization of the research problem.
• Illustrates the non-linear and contested nature of knowledge creation . The sources you cite show the reader how you characterized the dynamics of prior knowledge creation relevant to the research problem and how you managed to identify the contested relationships between problems and solutions proposed among scholars. Citations don't just list materials used in your study, they tell a story about how prior knowledge-making emerged from a constant state of creation, renewal, and transformation.
• Reinforces your arguments . Sources cited in your paper provide the evidence that readers need to determine that you properly addressed the “So What?” question. This refers to whether you considered the relevance and significance of the research problem, its implications applied to creating new knowledge, and its importance for improving practice. In this way, citations draw attention to and support the legitimacy and originality of your own ideas and assertions.
• Demonstrates that you "listened" to relevant conversations among scholars before joining in . Your citations tell the reader where you developed an understanding of the debates among scholars. They show how you educated yourself about ongoing conversations taking place within relevant communities of researchers before inserting your own ideas and arguments. In peer-reviewed scholarship, most of these conversations emerge within books, research reports, journal articles, and other cited works.
• Delineates alternative approaches to explaining the research problem . If you disagree with prior research assumptions or you believe that a topic has been understudied or you find that there is a gap in how scholars have understood a problem, your citations serve as the source materials from which to analyze and present an alternative viewpoint or to assert that a different course of action should be pursued. In short, the materials you cite serve as the means by which to argue persuasively against long-standing assumptions promulgated in prior studies.
• Helps the reader understand contextual aspects of your research . Cited sources help readers understand the specific circumstances, conditions, and settings of the problem being investigated and, by extension, how your arguments can be fully understood and assessed. Citations place your line of reasoning within a specific contextualized framework based on how others have studied the problem and how you interpreted their findings in support of your overall research objectives.
• Frames the development of concepts and ideas within the literature . No topic in the social and behavioral sciences rests in isolation from research that has taken place in the past. Your citations help the reader understand the growth and transformation of the theoretical assumptions, key concepts, and systematic inquiries that emerged prior to your engagement with the research problem.
• Underscores sources that were most important to you . Your citations represent a set of choices made about what you determined to be the most important sources for understanding the topic. They not only list what you discovered, but why it matters and how the materials you chose to cite fit within the broader context of your research design and arguments. As part of an overall assessment of the study’s validity and reliability , the choices you make also helps the reader determine what sources of research may have been excluded.
• Provides evidence of interdisciplinary thinking . An important principle of good research is to extend your review of the literature beyond the predominant disciplinary space where scholars have previously examined a topic. Citations provide evidence that you have integrated epistemological arguments, observations, and/or methodological strategies of other disciplines into your paper, thereby demonstrating that you understand the complex, interconnected nature of contemporary research topics.
• Forms the basis for bibliometric analysis of research . Bibliometric analysis is a quantitative method used, for example, to identify and predict emerging trends in research, document patterns of collaboration among scholars, explore the intellectual structure of a specific domain of research, map the development of research within and across disciplines, or identify gaps in knowledge within the literature. Bibliometrics data can also be used to visually map relationships among published studies. An author's citations to books, journal articles, research reports, and other publications represent the raw data used in bibliometric research.
• Supports critical thinking and independent learning . Evaluating the authenticity, reliability, validity, and originality of prior research is an act of interpretation and introspective reasoning applied to assessing whether a source of information will contribute to understanding the problem in ways that are persuasive and align with your overall research objectives. Reviewing and citing prior studies represents a deliberate act of critically scrutinizing each source as part of your overall assessment of how scholars have confronted the research problem.
• Honors the achievements of others . As Susan Blum recently noted,** citations not only identify sources used, they acknowledge the achievements of scholars within the larger network of research about the topic. Citing sources is a normative act of professionalism within academe and a way to highlight and recognize the work of scholars who likely do not obtain any tangible benefits or monetary value from their research endeavors. Your citations help to validate the work of others.

*Vernon. Jamie L. "On the Shoulder of Giants." American Scientist 105 (July-August 2017): 194.

**Blum, Susan D. "In Defense of the Morality of Citation.” Inside Higher Ed , January 29, 2024.

Aksnes, Dag W., Liv Langfeldt, and Paul Wouters. "Citations, Citation Indicators, and Research Quality: An Overview of Basic Concepts and Theories." Sage Open 9 (January-March 2019): https://doi.org/10.1177/2158244019829575; Blum, Susan Debra. My Word!: Plagiarism and College Culture . Ithaca, NY: Cornell University Press, 2009; Bretag, Tracey., editor. Handbook of Academic Integrity . Singapore: Springer Singapore, 2020; Ballenger, Bruce P. The Curious Researcher: A Guide to Writing Research Papers . 7th edition. Boston, MA: Pearson, 2012; D'Angelo, Barbara J. "Using Source Analysis to Promote Critical Thinking." Research Strategies 18 (Winter 2001): 303-309; Donthu, Naveen et al. “How to Conduct a Bibliometric Analysis: An Overview and Guidelines.” Journal of Business Research 133 (2021): 285-296; Mauer, Barry and John Venecek. “Scholarship as Conversation.” Strategies for Conducting Literary Research, University of Central Florida, 2021; Öztürk, Oguzhan, Ridvan Kocaman, and Dominik K. Kanbach. "How to Design Bibliometric Research: An Overview and a Framework Proposal." Review of Managerial Science (2024): 1-29; Why Cite? Poorvu Center for Teaching and Learning, Yale University; Citing Information. The Writing Center. University of North Carolina; Harvard Guide to Using Sources. Harvard College Writing Program. Harvard University; Newton, Philip. "Academic Integrity: A Quantitative Study of Confidence and Understanding in Students at the Start of Their Higher Education."  Assessment and Evaluation in Higher Education 41 (2016): 482-497; Referencing More Effectively. Academic Skills Centre. University of Canberra; Using Sources. Yale College Writing Center. Yale University; Vosburgh, Richard M. "Closing the Academic-practitioner Gap: Research Must Answer the “SO WHAT” Question." H uman Resource Management Review 32 (March 2022): 100633; When and Why to Cite Sources. Information Literacy Playlists, SUNY, Albany Libraries.

Structure and Writing Style

Referencing your sources means systematically showing what information or ideas you acquired from another author’s work, and identifying where that information come from . You must cite research in order to do research, but at the same time, you must delineate what are your original thoughts and ideas and what are the thoughts and ideas of others. Citations help achieve this. Procedures used to cite sources vary among different fields of study. If not outlined in your course syllabus or writing assignment, always speak with your professor about what writing style for citing sources should be used for the class because it is important to fully understand the citation style to be used in your paper, and to apply it consistently. If your professor defers and tells you to "choose whatever you want, just be consistent," then choose the citation style you are most familiar with or that is appropriate to your major [e.g., use Chicago style if you are majoring in history; use APA if its an education course; use MLA if it is literature or a general writing course].

GENERAL GUIDELINES

1. Are there any reasons I should avoid referencing other people's work? No. If placed in the proper context, r eferencing other people's research is never an indication that your work is substandard or lacks originality. In fact, the opposite is true. If you write your paper without adequate references to previous studies, you are signaling to the reader that you are not familiar with the literature on the topic, thereby, undermining the validity of your study and your credibility as a researcher. Including references in academic writing is one of the most important ways to demonstrate your knowledge and understanding of how the research problem has been addressed. It is the intellectual packaging around which you present your thoughts, ideas, and arguments to the reader.

2. What should I do if I find out that my great idea has already been studied by another researcher? It can be frustrating to come up with what you believe is a great topic only to find that it's already been thoroughly studied. However, do not become frustrated by this. You can acknowledge the prior research by writing in the text of your paper [see also Smith, 2002], then citing the complete source in your list of references. Use the discovery of prior studies as an opportunity to demonstrate the significance of the problem being investigated and, if applicable, as a means of delineating your analysis from those of others [e.g., the prior study is ten years old and doesn't take into account new variables]. Strategies for responding to prior research can include: stating how your study updates previous understandings about the topic, offering a new or different perspective, applying a different or innovative method of gathering and interpreting data, and/or describing a new set of insights, guidelines, recommendations, best practices, or working solutions.

3. What should I do if I want to use an adapted version of someone else's work? You still must cite the original work. For example, you use a table of statistics from a journal article published in 1996 by author Smith, but you have altered or added new data to it. Reference the revised chart, such as, [adapted from Smith, 1996], then cite the original source in your list of references. You can also use other terms in order to specify the exact relationship between the original source and the version you have presented, such as, "based on data from Smith [1996]...," or "summarized from Smith [1996]...." Citing the original source helps the reader locate where the information was first presented and under what context it was used as well as to evaluate how effectively you applied it to your own research.

4. What should I do if several authors have published very similar information or ideas? You can indicate that the topic, idea, concept, or information can be found in the works of others by stating something similar to the following example: "Though many scholars have applied rational choice theory to understanding economic relations among nations [Smith, 1989; Jones, 1991; Johnson, 1994; Anderson, 2003; Smith, 2014], little attention has been given to applying the theory to examining the influence of non-governmental organizations in a globalized economy." If you only reference one author or only the most recent study, then your readers may assume that only one author has published on this topic, or more likely, they will conclude that you have not conducted a thorough review of the literature. Referencing all relevant authors of prior studies gives your readers a clear idea of the breadth of analysis you conducted in preparing to study the research problem. If there has been a significant number of prior studies on the topic [i.e., ten or more], describe the most comprehensive and recent works because they will presumably discuss and reference the older studies. However, note in your review of the literature that there has been significant scholarship devoted to the topic so the reader knows that you are aware of the numerous prior studies.

5. What if I find exactly what I want to say in the writing of another researcher? In the social sciences, the rationale in duplicating prior research is generally governed by the passage of time, changing circumstances or conditions, or the emergence of variables that necessitate new investigations . If someone else has recently conducted a thorough investigation of precisely the same research problem that you intend to study, then you likely will have to revise your topic, or at the very least, review this literature to identify something new to say about the problem. However, if it is someone else's particularly succinct expression, but it fits perfectly with what you are trying to say, then you can quote from the author directly, referencing the source. Identifying an author who has made the exact same point that you want to make can be an opportunity to validate, as well as reinforce the significance of, the research problem you are investigating. The key is to build on that idea in new and innovative ways. If you are not sure how to do this, consult with a librarian .

6. Should I cite a source even if it was published long ago? Any source used in writing your paper should be cited, regardless of when it was written. However, in building a case for understanding prior research about your topic, it is generally true that you should focus on citing more recently published studies because they presumably have built upon the research of older studies. When referencing prior studies, use the research problem as your guide when considering what to cite. If a study from forty years ago investigated the same topic, it probably should be examined and considered in your list of references because the research may have been foundational or groundbreaking at the time, even if its findings are no longer relevant to current conditions or reflect current thinking [one way to determine if a study is foundational or groundbreaking is to examine how often it has been cited in recent studies using the "Cited by" feature of Google Scholar ]. However, if an older study only relates to the research problem tangentially or it has not been cited in recent studies, then it may be more appropriate to list it under further readings .

7. Can I cite unusual and non-scholarly sources in my research paper? The majority of the citations in a research paper should be to scholarly [a.k.a., academic; peer-reviewed] studies that rely on an objective and logical analysis of the research problem based on empirical evidence that reliably supports your arguments. However, any type of source can be considered valid if it brings relevant understanding and clarity to the topic. This can include, for example, non-textual elements such as photographs, maps, or illustrations. A source can include materials from special or archival collections, such as, personal papers, manuscripts, business memorandums, the official records of an organization, or digitized collections. Citations can also be to unusual items, such as, an audio recording, a transcript from a television news program, a unique set of data, or a social media post. The challenge is knowing how to cite unusual and non-scholarly sources because they often do not fit within consistent citation rules of books or journal articles. Given this, consult with a librarian if you are unsure how to cite a source.

NOTE:   In any academic writing, you are required to identify which ideas, facts, thoughts, concepts, or declarative statements are yours and which are derived from the research of others. The only exception to this rule is information that is considered to be a commonly known fact [e.g., "George Washington was the first president of the United States"] or a statement that is self-evident [e.g., "Australia is a country in the Global South"]. Appreciate, however, that any "commonly known fact" or self-evidencing statement is culturally constructed and shaped by specific social and aesthetical biases . If you have any doubt about whether or not a fact is considered to be widely understood knowledge, provide a supporting citation, or, ask your professor for clarification about whether the statement should be cited.

Ballenger, Bruce P. The Curious Researcher: A Guide to Writing Research Papers . 7th edition. Boston, MA: Pearson, 2012; Blum, Susan Debra. My Word!: Plagiarism and College Culture . Ithaca, NY: Cornell University Press, 2009; Bretag, Tracey., editor. Handbook of Academic Integrity . Singapore: Springer Singapore, 2020; Carlock, Janine. Developing Information Literacy Skills: A Guide to Finding, Evaluating, and Citing Sources . Ann Arbor, MI: University of Michigan Press, 2020; Harvard Guide to Using Sources. Harvard College Writing Program. Harvard University; How to Cite Other Sources in Your Paper. The Structure, Format, Content, and Style of a Journal-Style Scientific Paper. Department of Biology. Bates College; Lunsford, Andrea A. and Robert Connors; The St. Martin's Handbook . New York: St. Martin's Press, 1989; Mills, Elizabeth Shown. Evidence Explained: Citing History Sources from Artifacts to Cyberspace . 3rd edition. Baltimore, MD: Genealogical Publishing Company, 2015; Research and Citation Resources. The Writing Lab and The OWL. Purdue University; Writing Tutorial Services, Center for Innovative Teaching and Learning. Indiana University; Why Cite? Poorvu Center for Teaching and Learning, Yale Univeraity.

Other Citation Research Guides

The following USC Libraries research guide can help you properly cite sources in your research paper:

• Citation Guide

The following USC Libraries research guide offers basic information on using images and media in research:

Listed below are particularly well-done and comprehensive websites that provide specific examples of how to cite sources under different style guidelines.

• Purdue University Online Writing Lab
• Southern Cross University Harvard Referencing Style
• University of Wisconsin Writing Center

This is a useful guide concerning how to properly cite images in your research paper.

• Colgate Visual Resources Library, Citing Images

This guide provides good information on the act of citation analysis, whereby you count the number of times a published work is cited by other works in order to measure the impact of a publication or author.

Measuring Your Impact: Impact Factor, Citation Analysis, and other Metrics: Citation Analysis [Sandy De Groote, University of Illinois, Chicago]

Automatic Citation Generators

The links below lead to systems where you can type in your information and have a citation compiled for you. Note that these systems are not foolproof so it is important that you verify that the citation is correct and check your spelling, capitalization, etc. However, they can be useful in creating basic types of citations, particularly for online sources.

• BibMe -- APA, MLA, Chicago, and Turabian styles
• DocsCite -- for citing government publications in APA or MLA formats
• EasyBib -- APA, MLA, and Chicago styles
• Son of Citation Machine -- APA, MLA, Chicago, and Turabian styles

NOTE:   Many companies that create the research databases the USC Libraries subscribe to, such as ProQuest , include built-in citation generators that help take the guesswork out of how to properly cite a work. When available, you should always utilize these features because they not only generate a citation to the source [e.g., a journal article], but include information about where you accessed the source [e.g., the database].

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Cite Sources

Create citations for free.

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You’ve probably heard your teacher or professor talk about the importance of including citations in your research papers. But what exactly are citations? Why are they so important, and what are the different types? Read on for citation basics.

Here’s a table of contents for this guide:  

What is a Citation?

Citation examples, why do we have citations.

• Where Do We Have Citations?
• When Do I Make Citations?

Common Mistakes

5 tips for making the perfect citation, troubleshooting.

To begin, let’s examine what a citation actually is. A citation is how you let your readers know that you used information from outside sources in your work. It also describes those sources, and provides information that allows the reader to track them down. This information could be the author’s name, the publication date, or page numbers. The exact information included in the citation depends on the citation style you are using. Please see the citation manual for your chosen style for more specifics on how to make your citations in that style. Popular styles include MLA formatting , Chicago style, and APA style.

• How to Cite Google Images
• How to Cite Netflix
• How to Cite a PDF
• How to Cite Statistics
• How to Cite a Song
• How to Cite a Poem
• How to Cite a YouTube Video
• How to Cite a Podcast
• How to Cite a Book
• How to Cite an Inscription
• How to Cite a Quote

Having to write citations may seem like another boring step in the paper writing process. However, correctly citing sources in your research projects will ensure that you receive a better grade and create something that uniquely contributes to the subject area you are studying.

It doesn’t matter if you use MLA formatting , APA formatting, or any other citation style. Citing sources is something you should always do.

Here are just a few reasons why it is important for you to cite sources in your work:

Citations Provide Hard Evidence of Your Thesis/Ideas

Citing sources that back up your claim, otherwise known as your thesis statement, creates credibility for you as a researcher. It also opens up room for fact-checking and further research.

• Bonus points : If you can, find a way to cite a few sources that have the converse opinion or idea, and then demonstrate to the reader why you believe that viewpoint is wrong while backing up your claim up with sources. If you can do this, you are well on their way to winning over the reader to your side.
• Pro tip: Having many citations from a wide variety of sources related to your thesis indicates to your professor that you are working on a well-researched and respected subject.

Citations Give Credit to the Right People

Citing sources ensures that your reader or teacher can differentiate your original thoughts from the ideas in your sources and of other researchers in your subject area. This ensures that the sources you use receive proper credit for the author’s work, and that as the student, you receive deserved recognition for your unique contributions to the topic. Citations serve as a natural way to place your work within in the broader context of a subject area, and are an easy way for your teacher or professor to gauge your commitment to the project at hand. Going above and beyond in your work is always a good idea!

Citations Promote Originality and Prevent Plagiarism

The point of research projects is not to regurgitate information that can already be found elsewhere. We have Google for that! What your project should aim to do is promote an original idea or put a spin on an existing idea, and use credible sources to promote that idea. Copying or directly referencing a source without proper citations can lead to not only a poor grade, but accusations of academic dishonesty. By backing up your ideas with credible sources, you can easily avoid the trap of plagiarism, and promote further research on their topic. To help people find your unique perspective on your topic and create consistency throughout your work, it is always a good idea to use a specific, standardized citation style, such as APA format or MLA format.

Where Do We Have Citations, and What are the Types of Citations?

Citations typically can be found in two places: at the end of a paper in a bibliography or reference list, and within the text. The latter, sometimes called “in-text” citations, usually consist of a few details about the source, and are generally written in parenthesis at the end of the sentence where you referenced the source.

When Scout meets Boo Radley in To Kill a Mockingbird, she realizes that his reputation does not match his true character (Lee 85).

The citation in the reference list or bibliography corresponds with the in-text citation, and provides more holistic information about the source that you are citing. Publication information is included, as well as a list of all contributors to the source.

Lee, Harper. To Kill a Mockingbird. Perennial Modern Classics, 2006.

Note that each citation style has its own formatting rules regarding in-text and bibliographic citations. An APA citation will have similar information but look different from an MLA citation . Consult the style manual of your chosen citation style for more information.

When Should I Make Citations?

You should make a citation for a source whenever you:

● Directly quote a source ● Paraphrase information from a source ● Use an idea that is expressed in another source ● Make a specific reference to the work of another person

Let’s have a moment of silence for anyone out there who just received a graded paper filled with those dreaded red marks. Ugh. Nothing is worse than spending hours and hours pouring your heart and soul into a research paper, only to receive a failing grade or an accusation of plagiarism (gasp!) due to incorrect citations. It’s tough enough finding quality resources, analyzing them, and writing a high quality paper, but to receive marks off for incorrect citing totally crushes the soul.

We know there are so many rules to follow when it comes to citing sources. We’re here to highlight some of the most common citation mistakes students and scholars make when developing their research projects. Check out our top 5 below. Perhaps you’ll recognize a mistake or two you’ve been making in your own work.

If you’re looking for some extra help or guidance, check out the Citation Machine plagiarism and grammar checker. Write your paper, pop it into our “smart proofreader” and watch the magic happen. We’ll provide suggestions for citations and grammar edits so you can worry less about those dreaded red marks and more on your learning. Try it out now!

1. Forgetting to include in-text and parenthetical citations

You’ve found the perfect piece of information to include in your paper. Cool! As you’ve learned throughout school, you need to include a citation for that source in your bibliography or works cited list. Don’t forget to also include an in-text or parenthetical citation in the body of your project.

>Remember, every time outside information is added into a paper, you need to provide the reader with a glimpse as to where that information came from. You can do this with an in-text or parenthetical citation, which includes the author’s name in the sentence or directly after it, in parentheses. Depending on the citation style, you may also need to include the page number or year the source was published.

Here’s an example of how an MLA in-text citation could look in an assignment:

Stockett describes Celia as, “probably ten or fifteen years younger than me, twenty-two, twenty-three, and she’s real pretty” (37).

This excerpt is taken from page 37 in Kathryn Stockett’s book, The Help . In the works cited page at the end of the paper, the reader is provided with a full citation that shares the title of the book, the publisher, the year it was published, and possibly some other key pieces of information, depending on the citation style.

Every piece of information added into a paper needs two citations: a brief one in the body of the project and the full citation on the final page. Bam!

2. Period placement gone wrong

Inside? Outside? Outside and inside? It can be tricky to determine where to place those pesky little periods when including parenthetical citations.

For the majority of citation styles, the period is placed on the outside of the parentheses. Here’s a visual to help you out:

“It’s just that sometimes, our future is dictated by what we are, as opposed to what we want” (Sparks 59).

3. In-text and parenthetical citation overload

If you’re using the same reference over and over in one paragraph, it isn’t necessary to include an in-text or parenthetical citation after each sentence. Instead, save it for the end. The reader will be able to ascertain that all of the information from that single paragraph pertains to the individual in-text or parenthetical citation you’ve included.

4. Using the incorrect citation style or switching between two

Even though there are thousands (yes, thousands!) of citation styles available on Citation Machine, make sure to choose just one style for your project. Not sure whether to choose MLA formatting , APA , Chicago style format or another? Check to see if it’s included in the the assignment’s guidelines. Still not sure? Ask your teacher or school librarian. Whichever style you choose to roll with, make sure it’s consistent throughout the entire project. Remember, citations are included to help readers understand where information originated. If you choose to use various citation styles, it could cause some major confusion.

5. Problems with paraphrasing

A proper paraphrase involves taking someone else’s idea and rewriting it using your own words, in your own writing style. What it’s not is taking someone else’s idea and replacing the words with synonyms. Don’t be a synonym swapper. That’s plagiarism!

If you’re having a tough time trying to paraphrase another author’s words, try this out: Carefully read the text again. When you’re through, put it to the side, and think about what you just read. What was the author’s message? Now, rewrite it, using your own words and writing style. Remember to add an in-text or parenthetical citation at the end of the paraphrase and include the full citation in the works cited or reference page.

When you’re in a rush to meet a deadline and hand in your paper ASAP, it can be all too easy to make a mistake that can cost you big time. Citations are an often-overlooked component of a research paper that, when done correctly, can help you get your best grade yet. So how can you be sure that your citations are helping you achieve success? Here are some tips to take your research paper to the next level.

1. Include In-text or Parenthetical Citations When Paraphrasing

It can be tempting to just re-write a sentence from a source to include in your paper. But neglecting inclusion of a parenthetical, or in-text citation can lead to accusations of plagiarism. Being accused of committing plagiarism can not only impact your grade, but can put your enrollment in jeopardy as well. To avoid making this error, be sure to paraphrase carefully, and include a parenthetical or in-text citation in your paper each time you reference an outside source.

2. Periods (Almost) Always Go After the Parenthesis

Something as minor as an incorrectly placed period after a reference can lead to losing major points on your paper. In nearly every citation style with parenthetical citations, the period comes after the parenthesis, not before. Here is an example of a correctly placed period after a reference in APA format :

(Smith, 2005).

3. Be Consistent with Your Citation Style

Some classes require you use MLA format , while others require APA, while still others require Chicago Manual of Style . These specifications can be difficult to keep track of, but being consistent with your style is perhaps the easiest thing you can do to make sure you have well written citations. Double-checking your citations at the end of your paper before handing it in can lead to good last minute improvements.

4. All In-text and Parenthetical Citations Should Correspond with a Reference List Entry

In-text and parenthetical citations can be done while you are writing your paper, and are included each time you include information from an outside source. It is important to remember, however, that each time you do this, you should bear in mind that at the end of your paper in the works cited, bibliography, reference list, etc., there should be a corresponding longer reference to that same source that matches the in-text or parenthetical reference. When you are finished making your in-text and parenthetical references, use them to make a list of full citations you will need to include at the end of your paper.

5. Cite Properly, Not in Excess

While it is important to include citations in your paper, you shouldn’t be including them after each and every sentence you write. The important thing to remember is to cite only if you are including information from an outside source. This information should only be included if you feel that it backs up your claim effectively enough to the point where another researcher could potentially find that source and identify it as being related to your argument. If all the information in one paragraph you write refers to the same source, you only need to include one in-text or parenthetical citation in that paragraph, not after each individual sentence.

Solution #1: Identifying where to place a period in an in-text citation

1. If the in-text citation is at the end of the sentence or quotation, place a period after the citation (outside the parenthesis).

APA examples:

The results of Singh’s (2021) experiment were inconclusive (p. 42).

“The origin of the two variables could not be determined” (Singh, 2021, p. 42).

MLA examples:

The results of Singh’s experiment were inconclusive (42).

“The origin of the two variables could not be determined” (Singh 42).

2. Always use periods after the phrase “et al.”.

As Gregory Cheffsworth, et al. (2021) suggest, “sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store” (p. 12).

“Sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store” (Cheffsworth et al., 2021, p. 12).

As Gregory Cheffsworth, et al. suggest, “sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store” (p. 12).

“Sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store” (Cheffsworth et al. 12).

3. Block quotations in APA and MLA place the citation after the period.

A block quotation in APA is a quotation that is longer than forty words. The entire block quotations are indented by 0.5-inches.

            I wanted to make a casserole, but I soon realized that I did not have milk. However, as Gregory Cheffsworth, et al. (2021) suggest,

“Sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store but, when one encounters this situation, they must be prepared to adapt to the differences in flavor profiles by incorporating new spices.” (p. 12)

In MLA, if the quotation is longer than four lines, use a block quotation by indenting the entire paragraph 0.5-inches.

MLA example:

            I wanted to make a casserole, but I soon realized that I did not have milk. However, as Gregory Cheffsworth, et al. suggest,

Sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store but, when one encounters this situation, they must be prepared to adapt to the differences in flavor profiles by incorporating new spices. Depending on the selections, the sour cream’s natural taste can be emphasized or completely neutralized. As a result, one should not be afraid of the “sour” in sour cream. (12)

Solution #2: How to choose which citation style to use

• First, consult your syllabus, rubric, or writing guidelines. Most often, the expected citation style will be listed. If it is not, ask your teacher or the publication if they have a style preference.
• Use MLA style if you are writing within the humanities. This includes English literature, language, history, religion, and the arts.
• Use APA style if you are writing on the sciences, which includes subjects such as geology, education, or psychology.
• Use Chicago style if you are writing for business, history, or the fine arts.
• Note that some scientific genres require their own specific citation guide outside of these three widely used guides. For example, computer science frequently uses the IEEE citation guide.
• Look at sample papers or journal articles to see what is typically used.
• If all else fails, go to a library or your school’s writing center and ask for help.

Solution #3 When and how to create a direct quote versus a paraphrased citation

• For example, if you chose to directly quote information because the wittiness of an original excerpt is meaningful to your paper and is altered as a paraphrase.
• For example, when the quoted material is short compared to the rest of the sentence and does not add a significant amount of information. Use a paraphrase instead.
• Be aware that writing a direct quote without explaining it or further relating it to your topic can give the impression that you do not understand the information and are simply regurgitating the information.
• Avoid overusing direct quotes. Ideally, a paper is mostly written using your own words and thoughts.
• Use a paraphrase if you truly understand the idea/information and you can effectively relay the message in your own words.
• A paraphrase is also useful if you’re trying to synthesize a long quote or passage into a shorter passage.
• Before or after the paraphrase, you will need to discuss the information’s significance to your argument or paper.
• If you find that your paragraph is following the same word structure as the original statement, consider using a direct quote or consider rephrasing the sentence.
• One more reminder: Include an in-text citation to indicate that the original idea comes from another source.

Example of a direct quote:

            I wanted to make a casserole, but I soon realized that I did not have milk. However, as Gregory Cheffsworth (2021) suggests, “sour cream can be used as a milk substitute whenever one is low on ingredients and willingness to go to the store” (p. 47).

Example of a paraphrased citation:

            I wanted to make a casserole, but I soon realized that I did not have milk. However, I may be able to use sour cream instead of milk (Cheffsworth, 2021).

Finished with your citations and paper? Check out Citation Machine’s handy paper checker ! It can help you spot errors and polish your paper. There’s also a free  grammar guides library where you can learn what is a verb , an adjective definition , relative pronoun examples , and other grammar-related topics.

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Identifying Parts of a Citation

• Identifying Types of Sources
• Why Citing Sources is Important

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Citing or documenting the sources used in your research serves three purposes:

• It gives proper credit to the authors of the words or ideas that you incorporated into your paper.
• It allows those who are reading your work to locate your sources, in order to learn more about the ideas that you include in your paper.
• Citing your sources consistently and accurately helps you avoid committing plagiarism in your writing.

If you cite a source in your bibliography simply like this:

http://0-search.proquest.com.library.anselm.edu/sciencejournals/docview/963513704/FCC731C646FD481FPQ/8?accountid=13640

it does technically indicate where you found it, and someone might be able to find it again. But :

• What if the URL breaks?
• What if your reader doesn't have access to Geisel Library's databases? (This is the URL to the PDF view of a journal article in the database ProQuest Science Journals.)

A good citation makes it easy for the reader to figure out the who, what, when, and where of the source. In MLA style, a citation also often indicates how it was accessed.

Within MLA style, the format of the citation also tells you "what"--that this source is a journal article that you accessed through an online database.

• Template courtesy of Nash Community College
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Looking for a book, article, database or something else for your research, what is plagiarism.

Plagiarism is defined as "a piece of writing that has been copied from someone else and is presented as being your own work" or "taking someone's words or ideas as if they were your own"  [ 1 ]

Plagiarism is a serious issue in the academic community. While plagiarism sometimes does occur intentionally, it also occurs because the writer doesn’t understand or does not know how to avoid it. Please visit our online tutorial:  Plagiarism 101  for an entertaining and interesting look at why people plagiarize and strategies to avoid it.

Plagiarism occurs when you use someone else’s ideas and PRETEND they are your own. Avoiding plagiarism doesn’t mean that you can never use other people’s ideas. It’s a widely known secret that in fact you CAN use other peoples’ ideas and even their words. For many research papers you NEED to do this in order to prove your own points. So use their ideas! Use their words! Professors expect to see in your writing that you’ve done your research and understand what the experts think when you formed your own opinions. The trick is to acknowledge who these expert ideas really belong to by CITING them!

So let’s assume you don’t want to plagiarize, you’ve given yourself enough time to do it right, but you’re still not sure about “putting things in your own words,” judging when to cite work, or how to cite it. Read on for more information and examples.

Why acknowledge sources?

Doing research for a paper is an exploration and learning process. By acknowledging our sources we show our reader the path we took to come to our conclusions. Citing the authors we read shows how we tied others’ research and ideas together and how we came to learn about and develop our own ideas and opinions.

Why should you cite your sources?

1. Citations reflect the careful and thorough work you have put into locating and exploring your sources.

2. Citations help readers understand the context of your argument and are a courtesy to the reader, who may share your interest in a particular area of study.

3. Citations allow you to acknowledge those authors who contributed to your learning and your work.

4. Citations, by illustrating your own learning process, also draw attention to the originality and legitimacy of your own ideas.

5. By citing sources you demonstrate your integrity and skill as a responsible student and participant in your field of study.  [2]

When to cite sources

While professors and scholars may have specific requirements based on the needs of their discipline, there are cases where you should  always  cite your sources.

1. Direct quotes of more than one word.  If the author’s words are powerful or you need to be specific for your argument, the authors’ words can be used as a direct quote.

2. Paraphrasing or summarizing.  If you want to use someone else’s idea to help you make your point or to support your own ideas, in this case you would “translate” the ideas into your own words.

3. Information which may be common knowledge  but still unfamiliar to your reader. This would also include statistical information which may be familiar information but still requires confirmation.

4. Not just books or articles  should be cited. Any source that you use for information can and should be cited including interviews, websites, TV programs, etc.

5. Whenever you are not sure  if something should be cited, err on the side of caution and cite sources.

Let’s look at some examples…

Direct quotes

How much you quote will determine how it appears in the body of your paper but whether it is one word or an entire paragraph, direct quotes need to be cited.

Lappe’s explanation of a "thin democracy"  [3]  addresses a number of basic flaws within our American society.

Global warming is being recognized as a major issue throughout the world and as Al Gore instructs, "it is time to make peace with our planet."  [4]

Paraphrasing or Summarizing

This involves translating what you have read (or heard) and putting it into your own words. Paraphrasing typically refers to putting an idea or passage into your own words. Summarizing involves capturing the main idea or reducing a detailed piece to a shorter and more general synopsis.

Here's an example:

"Instructors usually allow students to find their own topics for a major writing assignment; thus choose something of interest to you so you won’t get bored after a few days. At the same time, your chosen topic will need a scholarly perspective." [5]

Paraphrase : When students are permitted to select their own topic to write about they should choose one that is interesting to them. The topic should also be scholarly in nature so that students will be able to find appropriate research and resources on the topic.  [5]

Summary : Students should select writing topics that are interesting and also lend themselves to academic research.  [5]

A summary generally addresses the overall theme of a passage, article, opinion, etc. while a paraphrase generally restates a more specific thought or idea. The difference between summarizing and paraphrasing is sometimes obvious and sometimes subtle — do you see the difference?

Common Knowledge? Or Not?

Some basic facts are common knowledge and easily confirmed from a variety of sources. Statistics should always be cited, as well as opinions and less familiar facts. Information that is considered well-known within your field of study will also help determine if it is considered common or not. However, if you are not sure, cite it!

The University at Albany located in Albany, New York and is part of the State University of New York.

This is common knowledge and easily confirmed in a multitude of sources.

The State University of New York was officially established in February of 1948 and currently consists of 64 institutions. The University at Albany is one of ten University Centers that are part of the SUNY system.  [6]

While the SUNY system is well known and these facts are easily confirmed, specific historical information or statistics should be cited.

How to cite?

We’ve talked about plagiarism as well as why and when to cite. The next question is "How?"

There are  two things you need to know  from your professor.

The FIRST is how you will reference your sources within your paper. Generally you will use one of the following options:

• IN TEXT  citation is when your source author is included within the body of your paper. This acts as a reference to your 'Works Cited' page.
• END NOTES  format is used in this document. The cited idea or quote is noted with a number and the source is listed at the end of the paper.
• FOOT NOTES  format is similar to end notes however the citations are listed at the bottom of each page.

The SECOND thing you need to know is what Format and Style Guide to use. There are very specific rules about how to do this that are not included in this document. Your professor will tell you which s/he wants you to follow. The choices will typically be one of the following:

• MLA  Format and Style Guide (Modern Language Association)
• APA  Format and Style Guide (American Psychological Association)
• CHICAGO  Manual of Style

Please visit the University Libraries' Citation Basics research guide  for information and instructions on these style guides. Once you know what your professor wants you will need to follow the rules of that format accordingly.

[ 1 ]  "Plagiarism."  WordNet 3.0 . Princeton University. 03 Apr. 2008.  Dictionary.com http://dictionary.reference.com/browse/plagiarism .

[ 2 ] Adapted from "Sources and Citation at Dartmouth College." Dartmouth College. 1998. Retrieved 9 Feb 2009.  http://www.dartmouth.edu/~writing/sources/sources-citation.html

[ 3 ] Lappe, Frances Moore.  Getting a Grip.  Cambridge, MA : Small Planet Media, 2007.

[ 4 ] Gore, Al. "Nobel Prize Acceptance Speech."  Al’s Journal . December 10, 2007. Retrieved April 10, 2008  http://blog.algore.com/2007/12/nobel_prize_acceptance_speech.html

[ 5 ] Lester, James D. & James D. Lester Jr.  Writing Research Papers: A Complete Guide, 11th Ed.  New York: Pearson Education, 2005.

[ 6 ] "Short History of SUNY." The State University of New York. 2008. Retrieved April 25, 2008.  http://www.suny.edu/student/university_suny_history.cfm

Still Have Questions?

• NU502 Library Guide
• Set Up & Sample Papers
• APA In-Text Citations

Seneca College Libraries

About in-text citation, quoting and paraphrasing: what's the difference, in-text citation for two or more authors/editors, faq: how do i cite more than one source in one in-text citation, faq - how do i cite two or more works by the same author with the same year of publication, faq - how do i cite a work quoted in another source.

• References - Citing Websites, Fact Sheets, & Clinical Guidelines

This guide is used/adapted with the permission of Seneca College Libraries. For information please contact [email protected] .

Note: When copying this guide, please retain this box.

In APA, in-text citations are inserted in the body of your research paper to briefly document the source of your information. Brief in-text citations point the reader to more complete information in the reference list at the end of the paper.

• In-text citations include the last name of the author followed by a comma and the publication year enclosed in parentheses: (Smith, 2007).
• If you are quoting directly the page number should be included, if given. If you are paraphrasing the page number is not required.
• If the author's name is not given, then use the first word or words of the title. Follow the same formatting that was used in the title, such as italics: ( Naturopathic , 2007).

Signal Phrase

If you refer to the author's name in a sentence you do not have to include the name again as part of your in-text citation. Instead include the date after the name and the page number (if there is one) at the end of the quotation or paraphrased section. For example:

Hunt (2011) explains that mother-infant attachment has been a leading topic of developmental research since John Bowlby found that "children raised in institutions were deficient in emotional and personality development" (p. 358).

There are two ways to integrate others' research into your assignment: you can paraphrase or you can quote.

Paraphrasing  is used to show that you understand what the author wrote. You must reword the passage, expressing the ideas in your own words, and not just change a few words here and there. Make sure to also include an in-text citation.

Quoting  is copying a selection from someone else's work, phrasing it exactly it was originally written. When quoting place quotation marks (" ") around the selected passage to show where the quote begins and where it ends. Make sure to include an in-text citation.

I f you would like to cite more than one source within the same in-text citation, simply record the in-text citations as normal and separate them with a semi-colon. List the sources alphabetically by author's last name or first word used from the title if no author is given, in the same order they would appear on the References List.

(Bennett, 2015; Smith, 2014). 

( Brock, 2016;  "It Takes Two,"  2015).

When you are citing two different sources that share the same author and year of publication, assign lowercase letters after the year of publication (a, b, c, etc.). Assign these letters according to which title comes first alphabetically. Use these letters in both in-text citations and the Reference list.

Example In-Text :

Paraphrasing content from first source by this author (Daristotle, 2015a). "Now I am quoting from the second source by the same author" (Daristotle, 2015b, p. 50).

Example Reference List entries:

Daristotle, J. (2015a). Name of book used as first source . Toronto, ON: Fancy Publisher.

Daristotle, J. (2015b). Title of book used as second source . Toronto, ON: Very Fancy Publisher.

Sometimes an author of a book, article or website will mention another person’s work by using a quotation or paraphrased idea from that source. The work that is mentioned in the article you are reading is called the primary source. The article you are reading is called the secondary source.

For example, suppose you are reading an article by Brown (2014) that cites information from an article by Snow (1982) that you would like to include in your essay. For the reference list, you will only make a citation for the secondary source (Brown). You do not put in a citation for the primary source (Snow) in the reference list. For the in-text citation, you identify the primary source (Snow) and then write "as cited in" the secondary source (Brown). If you know the year of the publication of the primary source, include it in the in-text citation. Otherwise, you can omit it. See below for examples.

Examples of in-text citations:

According to a study by Snow (1982, as cited in Brown, 2014), 75% of students believe that teachers should not assign nightly homework.

Note: If you don't have the publication date of Snow's article, you just omit it like this: According to a study by Snow (as cited in Brown, 2014), 75% of students believe that teachers should not assign nightly homework.

In fact, 75% of students believe that teachers should not assign nightly homework (Snow, 1982, as cited in Brown, 2014).

Snow (1982, as cited in Brown, 2014) concluded that "nightly homework is a great stressor for many students" (p.34).

Example of Reference list citation:

Brown, S. (2014). Trends in homework assignments.  Journal of Secondary Studies ,  12(3) , 29-38. http://doi.org/fsfsbit

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• ENGL105 - Scholarly Articles 101

Types of Sources

Engl105 - scholarly articles 101: types of sources, popular sources, scholarly sources.

• Peer-review
• Other Types of Sources
• Types of Scholarly Articles
• How to Read a Scholarly Article
• Extend Your Knowledge

You may have heard your professor talk about "popular sources" or "scholarly sources" or been asked to cite a "peer-reviewed" journal, but what do these terms even mean? This section will explain some of the different types of sources you may encounter when doing research and help you understand when to use them!

• Usually not written by subject experts

Audience/ Goal

• Inform a wide variety of readers about subjects of general interest
• Usually do not contain original research
• Can be published or shared in various locations
• May or may not have been reviewed or edited
• Typically do not contain citations
• Tend to be shorter and use more accessible language

• Written by experts in a field (professors, researchers, government employee)

Audience/Goal

• Provide others in the field with the most recent research findings
• Typically published in academic journals
• Undergo a rigorous peer-review process
• Includes citations
• Tend to be longer and use specialized language

Let's practice!

What were some of the clues you used to determine if the article was popular or scholarly? Did you look at the publisher? Did the article have an abstract? Make note of the clues you used and make sure to utilize them when searching in the future!

Does this mean that I should never use popular sources when writing a paper?

Not at all! Popular sources can be very useful. Reading popular sources like newspaper articles or magazines can be a great way to get ideas for topics that you might be interested in researching. Popular sources can also be a great way to build up your knowledge about a subject because of the way they explain things using terms the general public can understand. Once you have a better understanding, it will be easier to make sense of scholarly sources on the subject.

Popular sources can also be very useful if you are writing about a current event or want to talk about personal opinions that the general public might hold. When it doubt, talk to your professor about your sources- often times they are fine with popular sources, as long as you are using scholarly sources as well. 

Research & Instruction Associate

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Cite Sources Accurately in 10,000+ Styles with Paperpal’s New Citation Generator

Table of Contents

Accurate citations are crucial for ensuring academic integrity, but it’s not easy to get it right. Students and researchers often struggle with managing their references, formatting citations, and ensuring consistency between in-text citations and reference lists. Missing or incorrect citations raise the risk of plagiarism, resulting in academic penalties, retraction of published papers, loss of reputation, and even potential career setbacks.​ But what if there was a way to accurately cite sources without breaking your writing flow? Paperpal’s new online citation generator simplifies and enhances the citation process by allowing you to search, style, and cite sources as you write.  

Importance of Citations in Academic Writing   

Research progresses with previously published literature as the foundation, which makes it important to accurately cite and acknowledge the original authors and sources. This allows readers to easily locate referenced works for further reading or verification, enhancing transparency and trust in your findings. Authors are also expected to adhere to specific stylistic guidelines for formatting citations (in-line citations and reference lists) depending on the university or journal. Sounds easy enough, but if you consider that a research paper can have anywhere from 20 to 100+ references, cited multiple times in a paper, while review articles can have over 200 references, ensuring correct citations can be a Herculean task.  

Formatting Citations: Challenges for Authors  

Some of the most common problems academics face when adding citations to their writing include :  

• Reference Management: The manual process of creating and formatting citations can be very time-consuming. Keeping your references updated with the latest versions or editions of the sources can also be challenging, diverting time from actual research and writing.  
• Incorrect Source Attribution: Managing and organizing numerous sources can be overwhelming, leading to missing, misplaced, or misattributed citations. Failing to properly cite sources can result in unintentional plagiarism.  
• Formatting Errors: Ensuring citations are complete and consistently adhere to a specific formatting style (e.g., APA, MLA, Chicago) throughout the document can be tricky; any missing information (like page numbers or publication dates) can cause confusion or attribution errors.  
• Inconsistencies and Errors: Switching between in-text citations and full-text references when adding citations in your academic writing often leads to mistakes, affecting the overall quality of your thesis, dissertation or research paper.  

Introducing Paperpal’s Citation Generator  

With Paperpal’s new citation generator, there is no need to juggle between multiple tools to search, save, or format your citations. The free citation generator is seamlessly integrated into Paperpal’s writing workflow, empowering you to find and cite sources accurately in 10,000+ styles with a click. Available on Paperpal for Word and Web under the “Research & Cite” feature, this powerful citation maker automates this tedious process so you can focus on what truly matters: your research and writing.  

Why You Should Use Paperpal’s Free Citation Generator  

There are a number of citations tools in the market today, so what makes the Paperpal Citation Generator unique? Simply put, its comprehensive feature suite that allows you to research, write, cite, polish, and submit your work with confidence. Here’s a quick look at the benefits for academics:  

• In-Built Reference Management System: Focus on writing without the distraction of manual citation formatting. With an integrated reference finder and citation generator, Paperpal allows you to get factual insights from 250M+ research articles, save relevant papers to the citation library, and style and cite these correctly in 10,000+ styles in your writing with a click.
• Ensure Accuracy: Instantly produce citations that are complete with all the essential information, accurately formatted, and styled consistently across your document, eliminating citation errors that can impact your academic writing quality.
• Consistency in In-Text and Full-Text References: Achieve uniformity between in-text citations and full-text references effortlessly on Paperpal. If you’re writing on MS Word, simply copy and paste the styled citation and reference list into your text. Those using the Web editor can benefit from our one-click in-text citation capabilities, although automatic formatting of your reference list is only available to Prime members.
• Change Citation Styles as Needed: Those who want to cite the same source in different styles can do this easily with the Paperpal free reference generator. Simply choose the paper, pick your citation style, and generate accurately formatted citations on the go.
• Available Free, Without Ads: Not only is the online citation generator free to use, allowing you to style unlimited citations as and when you need it, you will never have to deal with any ad pop-ups or tabs that distract you from your writing . 
• All-in-One Solution: You no longer need to juggle multiple tools. Paperpal’s comprehensive feature suite is tailored to enhance and assist you at every step of the academic writing journey. Whether you need inspiration to overcome writer’s block, strengthen your text with science-backed insights, quickly write and develop your content, polish text for language, check for plagiarism, and ensure submission readiness, Paperpal has it all. 

Paperpal’s Citation Generator Covers Top Citation Styles  

Paperpal’s citation builder supports 10,000+ styles, all up-to-date versions, ensuring your writing is accurate, consistent, and professionally presented. Here’s a quick look at the top styles for citations in research papers it supports:    

• APA (American Psychological Association) – 7 th Edition: The latest APA style edition emphasizes the author-date method of citation, which is known for its straightforward format and clarity. It is widely used across the fields of psychology, education, and other social sciences.
• AMA (American Medical Association) – 11 th Edition: Updated to the most recent version, AMA citation style is primarily used in medical and health-related disciplines. It uses a numbered citation system, where references are listed in the order they appear in the text.
• MLA (Modern Language Association) – 9 th Edition: The MLA handbook follows an author-page number citation style. Known for its flexibility and simplicity, it is widely used when writing papers in the liberal arts and humanities. 
• Chicago (Chicago Manual of Style) – 17 th Edition: The updated Chicago style manual provides detailed formatting and citation guidelines. It offers two main systems: the Notes and Bibliography system (common in humanities field) and the Author-Date system (common in the sciences). 
• IEEE (Institute of Electrical and Electronics Engineers): The IEEE citation style is commonly used across technical fields such as engineering, computer science and information technology. It uses a numbered citation system with bracketed references.

How does Paperpal’s Citation Generator Work?  

Spend less time formatting citations and more time on research with Paperpal’s citation generator, which allows you to research, write, and cite 2x faster. Here’s a quick step-by-step process to help you use this AI citation builder effectively.  

1.  Search for References:   Login to Paperpal , open a document, click on the Research & Cite tab. Type your question to get factual answers from 250Mn+ research articles, with links to verified sources. You can also search for specific papers by looking up their title or DOI in the search bar.   

2.  Add Sources to Citation Library:  Manage references better by saving them in Paperpal’s in-built citation library. You can retrieve and add papers you already know you want to cite or use the AI reference finder to look up and include new sources to strengthen your writing.   

3.  Style and Cite References:  Once a paper is added to the library, select it and click on Cite. Pick from the 10,000+ citation styles Paperpal covers and the AI will generate the citation correctly.   

4. Insert Into Your Document: Copy and paste the citations into your MS Word document or use the web-based editor to integrate them directly into your writing.

Paperpal Promotes the Responsible Use of AI  

While Paperpal’s free citation generator streamlines the citation process, it does not allow users to simply select text and generate AI recommended citations for it. To maintain academic integrity, we encourage and enable academics to do the required research, literature reading, and cite sources after understanding them. Using an AI in-text citation generator or simply citing a reference based on the abstract alone could be misleading. Moreover, to ensure accurate citations, Paperpal does not support styling for any free-text citations that users may add within their text.     

At Paperpal, we are dedicated to continuously improving and expanding our support for authors across the globe. The new citation generator is just one of the many tools we offer to make academic writing more accessible and efficient for academics. As we strive to enhance our platform, we remain committed to helping researchers and students achieve their best work. Ready to experience the ease of accurate, hassle-free citations? Explore Paperpal for Free Now!  

Paperpal is a comprehensive AI writing toolkit that helps students and researchers achieve 2x the writing in half the time. It leverages 21+ years of STM experience and insights from millions of research articles to provide in-depth academic writing, language editing, and submission readiness support to help you write better, faster.

Get accurate academic translations, rewriting support, grammar checks, vocabulary suggestions, and generative AI assistance that delivers human precision at machine speed.  Try for free or  upgrade to Paperpal Prime  starting at US$19 a month  to access premium features, including consistency, plagiarism, and 30+ submission readiness checks to help you succeed.

Experience the future of academic writing –  Sign up to Paperpal and start writing for free!

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• Knowledge Base
• Citing sources

Citation Styles Guide | Examples for All Major Styles

Published on June 24, 2022 by Jack Caulfield . Revised on November 7, 2022.

A citation style is a set of guidelines on how to cite sources in your academic writing . You always need a citation whenever you quote , paraphrase , or summarize a source to avoid plagiarism . How you present these citations depends on the style you follow. Scribbr’s citation generator can help!

Different styles are set by different universities, academic associations, and publishers, often published in an official handbook with in-depth instructions and examples.

There are many different citation styles, but they typically use one of three basic approaches: parenthetical citations , numerical citations, or note citations.

Parenthetical citations

• Chicago (Turabian) author-date

CSE name-year

Numerical citations

CSE citation-name or citation-sequence

Note citations

• Chicago (Turabian) notes and bibliography

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Table of contents

Types of citation: parenthetical, note, numerical, which citation style should i use, parenthetical citation styles, numerical citation styles, note citation styles, frequently asked questions about citation styles.

The clearest identifying characteristic of any citation style is how the citations in the text are presented. There are three main approaches:

• Parenthetical citations: You include identifying details of the source in parentheses in the text—usually the author’s last name and the publication date, plus a page number if relevant ( author-date ). Sometimes the publication date is omitted ( author-page ).
• Numerical citations: You include a number in brackets or in superscript, which corresponds to an entry in your numbered reference list.
• Note citations: You include a full citation in a footnote or endnote, which is indicated in the text with a superscript number or symbol.

Citation styles also differ in terms of how you format the reference list or bibliography entries themselves (e.g., capitalization, order of information, use of italics). And many style guides also provide guidance on more general issues like text formatting, punctuation, and numbers.

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In most cases, your university, department, or instructor will tell you which citation style you need to follow in your writing. If you’re not sure, it’s best to consult your institution’s guidelines or ask someone. If you’re submitting to a journal, they will usually require a specific style.

Sometimes, the choice of citation style may be left up to you. In those cases, you can base your decision on which citation styles are commonly used in your field. Try reading other articles from your discipline to see how they cite their sources, or consult the table below.

The American Anthropological Association (AAA) recommends citing your sources using Chicago author-date style . AAA style doesn’t have its own separate rules. This style is used in the field of anthropology.

APA Style is defined by the 7th edition of the Publication Manual of the American Psychological Association . It was designed for use in psychology, but today it’s widely used across various disciplines, especially in the social sciences.

Generate accurate APA citations with Scribbr

The citation style of the American Political Science Association (APSA) is used mainly in the field of political science.

The citation style of the American Sociological Association (ASA) is used primarily in the discipline of sociology.

Chicago author-date

Chicago author-date style is one of the two citation styles presented in the Chicago Manual of Style (17th edition). It’s used mainly in the sciences and social sciences.

The citation style of the Council of Science Editors (CSE) is used in various scientific disciplines. It includes multiple options for citing your sources, including the name-year system.

Harvard style is often used in the field of economics. It is also very widely used across disciplines in UK universities. There are various versions of Harvard style defined by different universities—it’s not a style with one definitive style guide.

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MLA style is the official style of the Modern Language Association, defined in the MLA Handbook (9th edition). It’s widely used across various humanities disciplines. Unlike most parenthetical citation styles, it’s author-page rather than author-date.

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The American Chemical Society (ACS) provides guidelines for a citation style using numbers in superscript or italics in the text, corresponding to entries in a numbered reference list at the end. It is used in chemistry.

The American Medical Association ( AMA ) provides guidelines for a numerical citation style using superscript numbers in the text, which correspond to entries in a numbered reference list. It is used in the field of medicine.

CSE style includes multiple options for citing your sources, including the citation-name and citation-sequence systems. Your references are listed alphabetically in the citation-name system; in the citation-sequence system, they appear in the order in which you cited them.

The Institute of Electrical and Electronics Engineers ( IEEE ) provides guidelines for citing your sources with IEEE in-text citations that consist of numbers enclosed in brackets, corresponding to entries in a numbered reference list. This style is used in various engineering and IT disciplines.

The National Library of Medicine (NLM) citation style is defined in Citing Medicine: The NLM Style Guide for Authors, Editors, and Publishers (2nd edition).

Vancouver style is also used in various medical disciplines. As with Harvard style, a lot of institutions and publications have their own versions of Vancouver—it doesn’t have one fixed style guide.

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The Bluebook: A Uniform System of Citation is the main style guide for legal citations in the US. It’s widely used in law, and also when legal materials need to be cited in other disciplines.

Chicago notes and bibliography

Chicago notes and bibliography is one of the two citation styles presented in the Chicago Manual of Style (17th edition). It’s used mainly in the humanities.

The Oxford University Standard for the Citation of Legal Authorities ( OSCOLA ) is the main legal citation style in the UK (similar to Bluebook for the US).

There are many different citation styles used across different academic disciplines, but they fall into three basic approaches to citation:

• Parenthetical citations : Including identifying details of the source in parentheses —usually the author’s last name and the publication date, plus a page number if available ( author-date ). The publication date is occasionally omitted ( author-page ).
• Numerical citations: Including a number in brackets or superscript, corresponding to an entry in your numbered reference list.
• Note citations: Including a full citation in a footnote or endnote , which is indicated in the text with a superscript number or symbol.

Check if your university or course guidelines specify which citation style to use. If the choice is left up to you, consider which style is most commonly used in your field.

• APA Style is the most popular citation style, widely used in the social and behavioral sciences.
• MLA style is the second most popular, used mainly in the humanities.
• Chicago notes and bibliography style is also popular in the humanities, especially history.
• Chicago author-date style tends to be used in the sciences.

Other more specialized styles exist for certain fields, such as Bluebook and OSCOLA for law.

The most important thing is to choose one style and use it consistently throughout your text.

A scientific citation style is a system of source citation that is used in scientific disciplines. Some commonly used scientific citation styles are:

• Chicago author-date , CSE , and Harvard , used across various sciences
• ACS , used in chemistry
• AMA , NLM , and Vancouver , used in medicine and related disciplines
• AAA , APA , and ASA , commonly used in the social sciences

APA format is widely used by professionals, researchers, and students in the social and behavioral sciences, including fields like education, psychology, and business.

Be sure to check the guidelines of your university or the journal you want to be published in to double-check which style you should be using.

MLA Style  is the second most used citation style (after APA ). It is mainly used by students and researchers in humanities fields such as literature, languages, and philosophy.

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Citing Multiple Works

When citing multiple works parenthetically, place the citations in alphabetical order, separating them with semicolons.

(Adams et al., 2019; Shumway & Shulman, 2015; Westinghouse, 2017)

Arrange two or more works by the same authors by year of publication.

• Place citations with no date first.
• Then, order works with dates in chronological order.
• Place in-press citations last.

Give the authors’ surnames once; for each subsequent work, give only the date.

(Department of Veterans Affairs, n.d., 2017a, 2017b, 2019)

Zhou (n.d., 2000, 2016, in press)

Citing multiple works is covered in Section 8.12 of the APA Publication Manual, Seventh Edition

To highlight the work(s) most directly relevant to your point in a given sentence, place those citations first within parentheses in alphabetical order and then insert a semicolon and a phrase, such as “see also,” before the first of the remaining citations, which should also be in alphabetical order. This strategy allows authors to emphasize, for example, the most recent or most important research on a topic, which would not be reflected by alphabetical order alone.

(Sampson & Hughes, 2020; see also Augustine, 2017; Melara et al., 2018; Pérez, 2014)

If multiple sources are cited within the narrative of a sentence, they can appear in any order.

Suliman (2018), Gutiérrez (2012, 2017), and Medina and Reyes (2019) examined . . .

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Computer Science > Machine Learning

Title: the data addition dilemma.

Abstract: In many machine learning for healthcare tasks, standard datasets are constructed by amassing data across many, often fundamentally dissimilar, sources. But when does adding more data help, and when does it hinder progress on desired model outcomes in real-world settings? We identify this situation as the \textit{Data Addition Dilemma}, demonstrating that adding training data in this multi-source scaling context can at times result in reduced overall accuracy, uncertain fairness outcomes, and reduced worst-subgroup performance. We find that this possibly arises from an empirically observed trade-off between model performance improvements due to data scaling and model deterioration from distribution shift. We thus establish baseline strategies for navigating this dilemma, introducing distribution shift heuristics to guide decision-making on which data sources to add in data scaling, in order to yield the expected model performance improvements. We conclude with a discussion of the required considerations for data collection and suggestions for studying data composition and scale in the age of increasingly larger models.

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