APA (7th ed.) Zitazioa

(1942). Secondary recover of oil in the United States. American Petroleum Institute.

Chicago Style (17th ed.) Zitazioa

Secondary Recover of Oil in the United States. Nueva York: American Petroleum Institute, 1942.

MLA (9th ed.) Zitazioa

Secondary Recover of Oil in the United States. American Petroleum Institute, 1942.