APA (7th ed.) Citation

Geological Survey (U.S.) & Lyttle, P. T. (2017). Geologic map of the Washington West 30' x 60' quadrangle, Maryland, Virginia, and Washington D.C. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Peter T. Lyttle. Geologic Map of the Washington West 30' X 60' Quadrangle, Maryland, Virginia, and Washington D.C. [Washington, D.C.]: U.S. Department of the Interior, U.S. Geological Survey, 2017.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Peter T. Lyttle. Geologic Map of the Washington West 30' X 60' Quadrangle, Maryland, Virginia, and Washington D.C. U.S. Department of the Interior, U.S. Geological Survey, 2017.