United States. Superintendent of Documents. (1994). Environmental protection. U.S. G.P.O., Supt. of Docs.
Čikaški stil citiranja (17. izdanje)United States. Superintendent of Documents. Environmental Protection. Washington, DC: U.S. G.P.O., Supt. of Docs, 1994.
MLA način citiranja (9. izdanje)United States. Superintendent of Documents. Environmental Protection. U.S. G.P.O., Supt. of Docs, 1994.
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