APA (7e ed.) Bronvermelding

Não informado. Studies in Geography. Northwestern University, Department of Geography.

Chicago (17e ed.) Bronvermelding

Não informado. Studies in Geography. Evanston, Ill: Northwestern University, Department of Geography.

MLA (8e ed.) Bronvermelding

Não informado. Studies in Geography. Northwestern University, Department of Geography.

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