APA (7th ed.) Citation

Illinois State Geological Survey & Follmer, L. R. (1979). Wisconsinan, Sangamonian, and Illinoian stratigraphy in central Illinois. Illinois State Geological Survey, ... and Dept. of Geology, University of Illinois.

Chicago Style (17th ed.) Citation

Illinois State Geological Survey and Leon R. Follmer. Wisconsinan, Sangamonian, and Illinoian Stratigraphy in Central Illinois. Urbana: Illinois State Geological Survey, ... and Dept. of Geology, University of Illinois, 1979.

MLA (9th ed.) Citation

Illinois State Geological Survey and Leon R. Follmer. Wisconsinan, Sangamonian, and Illinoian Stratigraphy in Central Illinois. Illinois State Geological Survey, ... and Dept. of Geology, University of Illinois, 1979.