APA (7th ed.) Citation

Geological Survey (U.S.), Pennsylvania. Bureau of Topographic and Geologic Survey, Fullerton, D. S., & Richmond, G. M. (1992). Quaternary geologic map of the Hudson River 4 x 6 quadrangle, United States and Canada. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Pennsylvania. Bureau of Topographic and Geologic Survey, David S. Fullerton, and Gerald Martin Richmond. Quaternary Geologic Map of the Hudson River 4 X 6 Quadrangle, United States and Canada. Reston, VA: The Survey, 1992.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Quaternary Geologic Map of the Hudson River 4 X 6 Quadrangle, United States and Canada. The Survey, 1992.