APA (7th ed.) Citation

McGinnis, L. D., & Illinois State Geological Survey. (1976). Bouguer gravity of Illinois. Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

McGinnis, Lyle D., and Illinois State Geological Survey. Bouguer Gravity of Illinois. [Urbana, Ill.]: Illinois State Geological Survey, 1976.

MLA (8th ed.) Citation

McGinnis, Lyle D., and Illinois State Geological Survey. Bouguer Gravity of Illinois. Illinois State Geological Survey, 1976.