APA (7e ed.) Bronvermelding

Não informado. (1917). Bulletin. American Association of Petroleum Geologists.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin. Chicago, Ill: American Association of Petroleum Geologists, 1917.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin. American Association of Petroleum Geologists, 1917.

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