APA (7th ed.) Citation

Wickham, S. S., Johnson, W. H., & Glass, H. D. (1988). Regional geology of the Tiskilwa Till Member, Wedron Formation, northeastern Illinois. Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Wickham, Susan Specht, W. Hilton Johnson, and H. D. Glass. Regional Geology of the Tiskilwa Till Member, Wedron Formation, Northeastern Illinois. Champaign: Illinois State Geological Survey, 1988.

MLA (9th ed.) Citation

Wickham, Susan Specht, et al. Regional Geology of the Tiskilwa Till Member, Wedron Formation, Northeastern Illinois. Illinois State Geological Survey, 1988.