APA (7th ed.) Citation

(2008). A day in the life of a drop: Worksheet # 2. United States Environmental Protection Agency.

Chicago Style (17th ed.) Citation

A Day in the Life of a Drop: Worksheet # 2. [Washington, D.C.]: United States Environmental Protection Agency, 2008.

MLA (9th ed.) Citation

A Day in the Life of a Drop: Worksheet # 2. United States Environmental Protection Agency, 2008.