APA (7e ed.) Bronvermelding

Não informado. (2009). Occasional Publications of the Department of Geography. University of Illinois at Urbana-Champaign.

Chicago (17e ed.) Bronvermelding

Não informado. Occasional Publications of the Department of Geography. Urbana, Ill: University of Illinois at Urbana-Champaign, 2009.

MLA (8e ed.) Bronvermelding

Não informado. Occasional Publications of the Department of Geography. University of Illinois at Urbana-Champaign, 2009.

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