Cita APA (7a ed.)

United States. Superintendent of Documents. (1994). Environmental protection. U.S. G.P.O., Supt. of Docs.

Cita Chicago Style (17a ed.)

United States. Superintendent of Documents. Environmental Protection. Washington, DC: U.S. G.P.O., Supt. of Docs, 1994.

Cita MLA (9a ed.)

United States. Superintendent of Documents. Environmental Protection. U.S. G.P.O., Supt. of Docs, 1994.