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Albert S. Cook Library

ACS Style

Learn to cite sources using American Chemical Society (ACS) Style.

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Details to Note

Website citations include an author, title of website, URL, and access date. If a webpage is published by an organization but no individual author information is present, use the name of the organization in place of the author name.

Use the format described on this page for websites and webpages online. For other online sources, consult the corresponding pages of this guide, which are linked on the left (eg: the citation format for an eBook is described on the "Books & Book Chapters" page).

General Websites

Author or Organization (if any). Title of Site. URL (accessed YYYY-MM-DD).


U.S. Environmental Protection Agency. Toxics Release Inventory (TRI) Program. (accessed 2019-02-21).

Document from a Institutional or Agency Website

Author 1; Author 2; Author 3; etc. Title of Document. Title of Site or Organization, Date. URL (accessed YYYY-MM-DD).


Head. A. J. Staying Smart: How Today’s Graduates Continue to Learn Once They Complete College. Project Information Literacy, January 5, 2016. (accessed 2019-10-07).

CSB Safety Bulletin: Key Lessons for Preventing Incidents from Flammable Chemicals in Educational Demonstrations. U.S. Chemical Safety and Hazard Investigation Board, October 2014. (accessed 2019-10-07).

Blog Posts

Author 1; Author 2; etc. Blog Post Title. Blog Title. Title of Site or Publisher (if any), date. URL (accessed YYYY-MM-DD).


Brunning, A. The Chemistry of Ice Cream: Components, Structure, and Flavour. Compound Interest, July 14, 2015. (accessed 2019-02-28).