APA (7e ed.) Bronvermelding

Não informado. (1889). Bulletin of the Geological and Natural History Survey of Minnesota. Geological and Natural History Survey of Minnesota.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin of the Geological and Natural History Survey of Minnesota. Minneapolis, Minn: Geological and Natural History Survey of Minnesota, 1889.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin of the Geological and Natural History Survey of Minnesota. Geological and Natural History Survey of Minnesota, 1889.

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