APA-referens

Colby, C. C., & Foster, A. (1940). Economic geography: Industries and resources of the commercial world. United States of America: United States of America Armed Forces.

Chicago-stil citat

Colby, Charles C., och Alice Foster. Economic Geography: Industries and Resources of the Commercial World. United States of America: United States of America Armed Forces, 1940.

MLA-referens

Colby, Charles C., och Alice Foster. Economic Geography: Industries and Resources of the Commercial World. United States of America: United States of America Armed Forces, 1940.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.