APA (7th ed.) Citation

Roper, D. C. (1974). The distribution of middle woodland sites within the environment of the Lower Sangamon River, Illinois. Illinois State Museum.

Chicago Style (17th ed.) Citation

Roper, Donna C. The Distribution of Middle Woodland Sites Within the Environment of the Lower Sangamon River, Illinois. Springfield: Illinois State Museum, 1974.

MLA (9th ed.) Citation

Roper, Donna C. The Distribution of Middle Woodland Sites Within the Environment of the Lower Sangamon River, Illinois. Illinois State Museum, 1974.