APA (7e ed.) Bronvermelding

Não informado. (1999). Minnesota botanical studies. Geological and Natural History Survey of Minnesota.

Chicago (17e ed.) Bronvermelding

Não informado. Minnesota Botanical Studies. Minneapolis, Minn: Geological and Natural History Survey of Minnesota, 1999.

MLA (8e ed.) Bronvermelding

Não informado. Minnesota Botanical Studies. Geological and Natural History Survey of Minnesota, 1999.

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