APA (7th ed.) Zitazioa

United States Information Service. (1975). An outline of American geography. United States Information Agency.

Chicago Style (17th ed.) Zitazioa

United States Information Service. An Outline of American Geography. Nueva York: United States Information Agency, 1975.

MLA (9th ed.) Zitazioa

United States Information Service. An Outline of American Geography. United States Information Agency, 1975.