APA (7th ed.) Zitazioa

United States. Energy Information Administration. Office of Oil and Gas. (1994). Petroleum marketing annual. The Office : Supt. of Docs., U.S. G.P.O. [distributor.

Chicago Style (17th ed.) Zitazioa

United States. Energy Information Administration. Office of Oil and Gas. Petroleum Marketing Annual. Washington, D.C.: The Office : Supt. of Docs., U.S. G.P.O. [distributor, 1994.

MLA (9th ed.) Zitazioa

United States. Energy Information Administration. Office of Oil and Gas. Petroleum Marketing Annual. The Office : Supt. of Docs., U.S. G.P.O. [distributor, 1994.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.