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Chicago Citation Guide - 18th Edition

Citing using Chicago Manual of Style, 18th edition

Webpages

Template

Author. Year. "Title of Webpage." Website. Month/Day. URL.

Examples

Mark, Joshua J. 2009. "Socrates." Ancient History Encyclopedia. September 2. https://www.ancient.eu/socrates/.

(Mark 2009)

Micallef, Joseph V. n.d. "Origins of the July Crisis: Lighting the Fuse." Military.com. Accessed January 4, 2018. https://www.military.com/history/world-war-i-july-crisis.html.

(Micallef n.d.)

U.S. Department of Health & Human Services. 2015. "Ethical Principles in the Allocation of Human Organs." Organ Procurement and Transplantation Network. https://optn.transplant.hrsa.gov/resources/ethics/ethical-principles-in-the-allocation-of-human-organs/.

(U.S. Department of Health & Human Services 2015)

To use an abbreviation for an organizational author, use the abbreviation in the bibliography but spell out the organization's name in parentheses.

CDC (Centers for Disease Control and Prevention). 2024. "Facts About Seat Belt Use." April 24. https://www.cdc.gov/seat-belts/facts/.

(CDC 2024)

Archived Websites (e.g., Wayback Machine)

Template

Author. Archived Year. "Title of Webpage." Website. Archived Month/Day, at URL.

Examples

Collazo, Julie Schwietert. 2018. “Cuban Quimbombo (Afro-Cuban Okra).” The Latin Kitchen. Archived March 24, at https://web.archive.org/web/20180324130552/http://thelatinkitchen.com:80/blogs/kitchen/cuban-quimbombo-afro-cuban-okra.

(Collazo 2018)

Blog Posts

Template

Author. Year. "Title of Blog Post." Blog Title (blog)*. Sponsor, Month/Day. URL.

Example

Wade, Lisa. 2016. "Race-Based Activism is Changing College Campuses." Sociological Images (blog). The Society Pages, April 19. http://thesocietypages.org/socimages/2016/04/19/college-presidents-say-that-race-based-activism-is-changing-their-campuses/.

(Wade 2016)​

*(blog) is only needed if it it not clear that the source is a blog from the title.

Government Reports

Template

Author. Year. Title of Report. Report number. Organization/Website, Month/Day. URL.

Example

Cahill, Kevin E., Michael D. Giandrea, and Joseph F. Quinn. 2011. How Does Occupational Status Impact Bridge Job Prevalence? BLS Working Paper 447. Bureau of Labor Statistics, July 2011. https://www.bls.gov/osmr/pdf/ec110050.pdf.

(Cahill et al. 2011, 2)​

Theses/Dissertations

Template

Author. Year. "Title of Thesis/Dissertation." Type, Institution. URL.

Examples

Cherban, Mackenzie. 2019. "Amplifying ASL: Designing with Futuring and Inclusion." Master's thesis, Carnegie Mellon University. https://kilthub.cmu.edu/articles/thesis/Amplifying_ASL_Designing_with_Futuring_and_Inclusion/7771094?file=14467457.

(Cherban 2019)

Frye, Katherine. 2022. "Exploring Population-Level Trends in Children's Social Skills Over Time Using Behavior Rating Scales." PhD diss., University of Florida. https://ufdc.ufl.edu/UFE0058978/00001/pdf.

(Frye 2022)

Email

Use in-text citations only for personal communication such as email.

Example

(John Smith, email message to author, November 12, 2017)

(John Smith, pers. commun.)

Social Media

Template

Author (username). Year. "Text of post." Website, Month/Day. URL.

Examples

Pope Francis (@Pontifex). 2017. “I encourage world leaders to set aside partisan and ideological interests and seek together the common good of all humanity.” Twitter (now X), September 12. https://twitter.com/Pontifex/status/907566964431835136.

(Pope Francis 2017)​

Santa Fe College. 2017. “Students are now eligible to receive federal Pell grant funds for the summer term. Find out how.” Facebook, September 4. https://www.facebook.com/santafecollege/posts/10155020259358224.

(Santa Fe College 2017)​

ChatGPT/Generative AI

Please be sure your professor will allow you to use ChatGPT and other generative AI for your research or writing!

Template

Company. Year. Response to “Prompt” Product/Version, Month/Day. URL.

Example

OpenAI. 2024. Response to “Could you please give a few bulleted points about the purpose of a literature review?” ChatGPT-4o, October 21. https://chatgpt.com/share/671689d2-38b0-800b-959b-713092bd3f2a.

(OpenAI, 2024)

For more information on citing ChatGPT or other generative AI programs, please visit this Chicago Manual of Style FAQ post about documenting sources.

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