Cook, R. C. (1941). Control of the petroleum industry by major oil companies. [publisher not identified].
Chicago-referens (17:e uppl.)Cook, Roy C. Control of the Petroleum Industry by Major Oil Companies. [Washington]: [publisher not identified], 1941.
MLA-referens (8:e uppl.)Cook, Roy C. Control of the Petroleum Industry by Major Oil Companies. [publisher not identified], 1941.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.