APA (7th ed.) Citation

Geological Survey (U.S.) & Davis, A. M. (2002). Geologic map database of the Washington DC area, featuring data from three 30 x 60 minute quadrangles, Frederick, Washington West, and Fredericksburg. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Adam M. Davis. Geologic Map Database of the Washington DC Area, Featuring Data from Three 30 X 60 Minute Quadrangles, Frederick, Washington West, and Fredericksburg. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Adam M. Davis. Geologic Map Database of the Washington DC Area, Featuring Data from Three 30 X 60 Minute Quadrangles, Frederick, Washington West, and Fredericksburg. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.