APA (7e ed.) Bronvermelding

Não informado. (1894). Bulletin. South Dakota Geological and Natural History Survey.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin. Vermillion, SD: South Dakota Geological and Natural History Survey, 1894.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin. South Dakota Geological and Natural History Survey, 1894.

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