How To Chicago Style Citation

Chicago style citation is a widely used citation style that provides authors with a flexible and comprehensive system for citing sources. Developed by the University of Chicago Press, this style is commonly used in the humanities, social sciences, and natural sciences. In this article, we will delve into the world of Chicago style citation, exploring its history, formatting guidelines, and best practices for implementation.
Introduction to Chicago Style Citation

The Chicago Manual of Style (CMS) is a comprehensive guide that outlines the rules and guidelines for Chicago style citation. First published in 1906, the CMS has undergone numerous revisions, with the latest edition being the 17th edition. The CMS provides authors with a detailed framework for citing sources, including books, journals, newspapers, and online materials. Chicago style citation is known for its flexibility, allowing authors to choose between two main citation styles: author-date and notes-bibliography.
Author-Date System
The author-date system is commonly used in the social sciences and natural sciences. In this system, sources are cited using a combination of the author’s last name, publication year, and page numbers (if applicable). For example, a citation for a book would appear as (Smith 2020, 23-25). The corresponding reference list entry would include the author’s full name, publication year, title of the book, and publication information.
Source Type | Author-Date Citation | Reference List Entry |
---|---|---|
Book | (Smith 2020, 23-25) | Smith, John. 2020. The History of Chicago. Chicago: University of Chicago Press. |
Journal Article | (Johnson 2019, 12-15) | Johnson, Mary. 2019. "The Impact of Climate Change." Journal of Environmental Studies 10 (2): 12-15. |

Notes-Bibliography System
The notes-bibliography system is commonly used in the humanities. In this system, sources are cited using footnotes or endnotes, which are numbered consecutively throughout the text. The corresponding bibliography entry would include the author’s full name, title of the source, and publication information. For example, a footnote citation for a book would appear as 1, with the corresponding bibliography entry including the author’s full name, title of the book, and publication information.
Source Type | Notes-Bibliography Citation | Bibliography Entry |
---|---|---|
Book | 1 | Smith, John. The History of Chicago. Chicago: University of Chicago Press, 2020. |
Journal Article | 2 | Johnson, Mary. "The Impact of Climate Change." Journal of Environmental Studies 10 (2): 12-15, 2019. |
Best Practices for Chicago Style Citation

To ensure accuracy and consistency in Chicago style citation, it’s essential to follow best practices. Here are some tips to keep in mind:
- Always consult the latest edition of the CMS for the most up-to-date guidelines.
- Use a consistent citation style throughout the text.
- Double-check citations for accuracy and completeness.
- Use a citation management tool, such as Zotero or EndNote, to help with formatting and organization.
Common Challenges in Chicago Style Citation
While Chicago style citation is a widely used and respected citation style, it can also be challenging to implement. Some common challenges include:
- Formatting inconsistencies: Ensuring consistency in formatting, particularly when using the notes-bibliography system, can be challenging.
- Source type identification: Identifying the correct source type, such as a book or journal article, can be difficult, particularly when working with online sources.
- Citation style switching: Switching between the author-date and notes-bibliography systems can be confusing, particularly when working on a large project.
What is the difference between the author-date and notes-bibliography systems?
+The author-date system is commonly used in the social sciences and natural sciences, and uses a combination of the author’s last name, publication year, and page numbers to cite sources. The notes-bibliography system, on the other hand, is commonly used in the humanities, and uses footnotes or endnotes to cite sources.
How do I cite a source with multiple authors in Chicago style?
+In Chicago style, sources with multiple authors are cited by listing all authors’ names, separated by commas, in the order they appear on the title page. For example, a book with three authors would be cited as (Smith, Johnson, and Williams 2020).
What is the purpose of a bibliography in Chicago style citation?
+A bibliography in Chicago style citation is a comprehensive list of all sources cited in the text, and provides readers with a complete and accurate record of the sources used in the research.