APA (7th ed.) Citation

United States. Environmental Protection Agency. (1990). Clean Air Act amendments of 1990: Detailed summary of titles. U.S. Environmental Protection Agency.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Clean Air Act Amendments of 1990: Detailed Summary of Titles. [Washington, D.C.?]: U.S. Environmental Protection Agency, 1990.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Clean Air Act Amendments of 1990: Detailed Summary of Titles. U.S. Environmental Protection Agency, 1990.