Skip to Main Content


Email this link:

What is the Author-Date System?

Similar to APA Style, in Chicago Style's Author-Date System, sources are cited in-text using parenthetical notes that include the author's late name and year of publication. Complete bibliographic information is compiled in a reference list at the end of the paper.

The Author-Date System is commonly used in the sciences and social sciences.

Core Components of a Citation

Author-Date citations are comprised of the following information:

First author surname, first name and initial. Second author first name and last name. Date. Title. Publication Information.

Sample Citations

Journal Article

Galloway, Mollie K., Petra Callin, Shay James, Harriette Vimegnon, and Lisa McCall. 2019. “Culturally Responsive, Antiracist, or Anti-Oppressive? How Language Matters for School Change Efforts.” Equity & Excellence in Education 52, no. 4: 485–501. doi:10.1080/10665684.2019.1691959.

In-Text Citation: (Galloway et al. 2019, 486-91)


Kendi, Ibram X. 2019. How to be an Antiracist. New York: One World.

In-Text Citation: (Kendi 2019, 88-104)


Thomas, Traci. 2019. "The Short Stacks 22: Ibram X. Kendi//How to be an Antiracist," The Stacks. Podcast.

In-Text Citation: (Thomas 2019)

Chicago Style Resources

The Chicago Manual of Style Online*

Read the entirety of CMOS online. You must be logged into the VPN to access this resource.

Excelsior College Online Writing Lab

Provides detailed information about citing using CMOS.