APA (7th ed.) Citation

Illinois State Geological Survey. (1990). Illinois minerals. The Survey.

Chicago Style (17th ed.) Citation

Illinois State Geological Survey. Illinois Minerals. [Urbana, Ill.]: The Survey, 1990.

MLA (9th ed.) Citation

Illinois State Geological Survey. Illinois Minerals. The Survey, 1990.

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