APA (7th ed.) Citation

Jacobson, R. J., Trask, C. B., Palmer, J. E., Peppers, R. A., Nelson, W. J., Killey, M. M., & Lineback, J. A. (1983). Geologic notes. Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Jacobson, R. J., C. Brian Trask, James Edward Palmer, Russel A. Peppers, W. John Nelson, Myrna M. Killey, and Jerry Alvin Lineback. Geologic Notes. Champaign, IL: Illinois State Geological Survey, 1983.

MLA (9th ed.) Citation

Jacobson, R. J., et al. Geologic Notes. Illinois State Geological Survey, 1983.