APA (7th ed.) Citation

Southworth, S. (2007). Geologic map of the Frederick 30ʹ x 60ʹ quadrangle, Maryland, Virginia, and West Virginia. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Southworth, Scott. Geologic Map of the Frederick 30ʹ X 60ʹ Quadrangle, Maryland, Virginia, and West Virginia. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2007.

MLA (9th ed.) Citation

Southworth, Scott. Geologic Map of the Frederick 30ʹ X 60ʹ Quadrangle, Maryland, Virginia, and West Virginia. U.S. Dept. of the Interior, U.S. Geological Survey, 2007.