ACS (American Chemical Society): Citing Your Sources

Developed by the American Chemical Society, this style may be used for research papers in the field of chemistry.

Each citation consists of two parts: the in-text citation, which provides brief identifying information within the text, and the reference list, a list of sources that provides full bibliographic information.

Widely-known, generally-accepted information that is not attributable to one source.

Examples:

• Columbus Day is a national holiday that celebrates the arrival of explorer Christopher Columbus to America in 1492. (common knowledge, no citation needed)
• Many institutions, including Williams College, now recognize the holiday as Indigenous Peoples Day. (common knowledge, no citation needed)
• South Dakota was likely the first state to officially recognize Indigenous Peoples Day as a state holiday.¹ (not common knowledge, citation needed)

What is considered common knowledge can be tricky. When in doubt, ask your professor!

1. Delkic, Melina. "Indigenous Peoples Day, Explained." New York Times, October 9, 2022, https://www.nytimes.com/article/indigenous-peoples-day.html.