APA (7e ed.) Bronvermelding

Não informado. (1931). Geological Bulletin. Department of Conservation, Geological Survey.

Chicago (17e ed.) Bronvermelding

Não informado. Geological Bulletin. New Orleans, La: Department of Conservation, Geological Survey, 1931.

MLA (8e ed.) Bronvermelding

Não informado. Geological Bulletin. Department of Conservation, Geological Survey, 1931.

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