APA (7e ed.) Bronvermelding

Não informado. (1972). Geographical survey. Ball State University, Department of Geography and Geology.

Chicago (17e ed.) Bronvermelding

Não informado. Geographical Survey. Muncie, Ind: Ball State University, Department of Geography and Geology, 1972.

MLA (8e ed.) Bronvermelding

Não informado. Geographical Survey. Ball State University, Department of Geography and Geology, 1972.

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