APA (7th ed.) Citation

Illinois Geological Survey. (1917). Biennial report for 1911 and 1912 - Administrative report and economic and geological papers. Illinois state Geological Survey. University of Illinois.

Chicago Style (17th ed.) Citation

Illinois Geological Survey. Biennial Report for 1911 and 1912 - Administrative Report and Economic and Geological Papers. Urbana: Illinois state Geological Survey. University of Illinois, 1917.

MLA (9th ed.) Citation

Illinois Geological Survey. Biennial Report for 1911 and 1912 - Administrative Report and Economic and Geological Papers. Illinois state Geological Survey. University of Illinois, 1917.