APA (7th ed.) Citation

Geological Survey (U.S.), Kentucky Geological Survey, Johnson, W. D., Jr, & Smith, A. E. (1975). Geologic map of the Calhoun quadrangle, western Kentucky. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Kentucky Geological Survey, William D. Johnson, Jr, and Avery E. Smith. Geologic Map of the Calhoun Quadrangle, Western Kentucky. Reston, Va.: The Survey, 1975.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Calhoun Quadrangle, Western Kentucky. The Survey, 1975.