APA (7e ed.) Bronvermelding

Cook, R. C. (1941). Control of the petroleum industry by major oil companies. [publisher not identified].

Chicago (17e ed.) Bronvermelding

Cook, Roy C. Control of the Petroleum Industry by Major Oil Companies. [Washington]: [publisher not identified], 1941.

MLA (8e ed.) Bronvermelding

Cook, Roy C. Control of the Petroleum Industry by Major Oil Companies. [publisher not identified], 1941.