Website
Website example
University of Chicago Press. 2024. "Chicago Manual of Style." The Chicago Manual of Style Online. March 15, 2024. https://www.chicagomanualofstyle.org/.
History & Fine Arts citation style
Free Chicago author-date 18th edition Citation Generator
Chicago author-date 18th edition is one of two Chicago Manual of Style citation systems. It uses parenthetical citations with author and year, ideal for sciences and social sciences.
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Chicago Author-Date 18Journal article
Smith, Jane A., and Mark B. Doe. 2024. "The Effects of Climate Change on Coastal Ecosystems." Journal of Environmental Science 45 (3): 234–51.
Book
Smith, Jane A. 2023. Coastal Ecosystems in a Changing Climate. 2nd ed. Cambridge: Cambridge University Press.
Website
National Oceanic and Atmospheric Administration. 2024. "Climate Change Indicators: Sea Surface Temperature." NOAA Climate.gov. https://www.climate.gov/news-features/sea-surface-temperature.
In-text
(Smith and Doe 2024, 237)
Sample formatted to the official Chicago author-date 18th edition rules. Your real citation fills in from any URL, DOI, or ISBN.
Chicago author-date 18th edition Citation Examples
See how to format different source types in Chicago author-date 18th edition.
Journal article
Journal article example
Smith, John, and Mary Doe. 2024. "Historical Perspectives on Art." Art History 45, no. 2: 123-45.
Book
Book example
Brown, Charles. 2023. The History of Art. 3rd ed. Chicago: Academic Press.
Quick Chicago author-date 18th edition Rules
Author Format
Last name, First name. Use 'and' before last author.
Title Format
Title case for article titles in quotation marks. Italicize book and journal titles.
Date Format
Year in parentheses follows author in reference list. Use month day, year for web sources.
Journal/Source
Journal name italicized, volume number, issue number (in parentheses), year, and page range.
In-text Citations
Use parenthetical author-date format: (Author Year) or (Author Year, page number) for direct quotes.
Chicago author-date 18th edition Frequently Asked Questions
What is Chicago Author-Date style?
Chicago Author-Date is one of two Chicago Manual of Style systems. It uses parenthetical citations (Author Year) and is preferred for sciences and social sciences.
How do I cite a website in Chicago Author-Date?
Include author, year, page title in quotation marks, website name italicized, full date, and URL.
When should I use Chicago Author-Date vs Notes-Bibliography?
Author-Date is preferred for sciences and social sciences. Notes-Bibliography is preferred for humanities, literature, and arts.
How do I format in-text citations in Chicago Author-Date?
Use (Author Year) for paraphrases and (Author Year, page) for direct quotes. For narrative citations, use Author (Year).
Chicago author-date 18th edition Citation Guides
How to Write an Annotated Bibliography
Learn how to write an annotated bibliography in APA 7, MLA 9, and Chicago styles - with real examples, formatting rules, and a breakdown of what makes a strong annotation.
How to Cite Sources in Chicago Author-Date Style
Learn Chicago Manual of Style 18th edition author-date citations - in-text parenthetical references, reference list formatting, and worked examples for sciences and social sciences.
How to Cite Sources in Chicago Notes-Bibliography Style
A practical guide to Chicago Manual of Style 18th edition notes-bibliography system - footnotes, bibliography entries, and worked examples for common source types.
Complete Guide to In-Text Citations
Everything you need to know about in-text citations across APA, MLA, Chicago, Harvard, and IEEE - with examples for every situation.