APA (7e ed.) Bronvermelding

Não informado. (2008). State University of Iowa studies in natural history. State University of Iowa.

Chicago (17e ed.) Bronvermelding

Não informado. State University of Iowa Studies in Natural History. Iowa City, Iowa: State University of Iowa, 2008.

MLA (8e ed.) Bronvermelding

Não informado. State University of Iowa Studies in Natural History. State University of Iowa, 2008.

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