APA (7th ed.) Citation

Illinois State Geological Survey & Illinois. Department of Registration and Education. (1926). Illinois petroleum. State Geological Survey.

Chicago Style (17th ed.) Citation

Illinois State Geological Survey and Illinois. Department of Registration and Education. Illinois Petroleum. Urbana, Ill.: State Geological Survey, 1926.

MLA (9th ed.) Citation

Illinois State Geological Survey and Illinois. Department of Registration and Education. Illinois Petroleum. State Geological Survey, 1926.

Warning: These citations may not always be 100% accurate.