APA (7e ed.) Bronvermelding

Não informado. (2013). Bulletin of the Illinois Geographical Society. Illinois Geographical Society.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin of the Illinois Geographical Society. Chicago, Ill: Illinois Geographical Society, 2013.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin of the Illinois Geographical Society. Illinois Geographical Society, 2013.

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