APA (7th ed.) Citation

Lee, W., Illinois State Geological Survey, & Geological Survey. (1926). Gillespie-Mount Olive folio, Illinois. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Lee, Wallace, Illinois State Geological Survey, and Geological Survey. Gillespie-Mount Olive Folio, Illinois. Washington, D.C.: U.S. Geological Survey, 1926.

MLA (8th ed.) Citation

Lee, Wallace, et al. Gillespie-Mount Olive Folio, Illinois. U.S. Geological Survey, 1926.