Illinois. Natural History Survey Division, Neeley, R. D., & Heister, C. G. (1987). The Natural resources of Illinois: Introduction and guide. Illinois Natural History Survey, Department of Energy and Natural Resources, State of Illinois.
Chicago Style (17th ed.) CitationIllinois. Natural History Survey Division, R. Dan Neeley, and Carla G. Heister. The Natural Resources of Illinois: Introduction and Guide. Champaign, Ill.: Illinois Natural History Survey, Department of Energy and Natural Resources, State of Illinois, 1987.
MLA (9th ed.) CitationIllinois. Natural History Survey Division, et al. The Natural Resources of Illinois: Introduction and Guide. Illinois Natural History Survey, Department of Energy and Natural Resources, State of Illinois, 1987.
Warning: These citations may not always be 100% accurate.