APA (7th ed.) Citation

Geological Survey (U.S.), University of Virginia. Department of Environmental Sciences, Howard, A. D., Richmond, G. M., Fullerton, D. S., & Christiansen, A. C. (1991). Quaternary geologic map of the Blue Ridge 4 x 6 quadrangle, United States. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), University of Virginia. Department of Environmental Sciences, Alan D. Howard, Gerald Martin Richmond, David S. Fullerton, and Ann Coe Christiansen. Quaternary Geologic Map of the Blue Ridge 4 X 6 Quadrangle, United States. Reston, Va.: The Survey, 1991.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Quaternary Geologic Map of the Blue Ridge 4 X 6 Quadrangle, United States. The Survey, 1991.