APA (7e ed.) Bronvermelding

Não informado. (1908). California oil world. Petroleum Publishers.

Chicago (17e ed.) Bronvermelding

Não informado. California Oil World. Bakersfielf, Calif: Petroleum Publishers, 1908.

MLA (8e ed.) Bronvermelding

Não informado. California Oil World. Petroleum Publishers, 1908.

Let op: Deze citaties zijn niet altijd 100% accuraat.