APA (7th ed.) Citation

Voskuil, W. H., & Stevens, D. F. (1944). Illinois mineral industry in 1943. State Geological Survey.

Chicago Style (17th ed.) Citation

Voskuil, Walter H., and Douglas F. Stevens. Illinois Mineral Industry in 1943. Urbana, Ill.: State Geological Survey, 1944.

MLA (9th ed.) Citation

Voskuil, Walter H., and Douglas F. Stevens. Illinois Mineral Industry in 1943. State Geological Survey, 1944.