Não informado. (2013). Bulletin of the Illinois Geographical Society. Illinois Geographical Society.
Citace podle Chicago (17th ed.)Não informado. Bulletin of the Illinois Geographical Society. Chicago, Ill: Illinois Geographical Society, 2013.
Citace podle MLA (8th ed.)Não informado. Bulletin of the Illinois Geographical Society. Illinois Geographical Society, 2013.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..