APA (7th ed.) Citation

Perry, W. J. (2003). Geologic map of the Horse Mountain quadrangle, Garfield County, Colorado (Version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Perry, William J. Geologic Map of the Horse Mountain Quadrangle, Garfield County, Colorado. Version 1.0. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2003.

MLA (9th ed.) Citation

Perry, William J. Geologic Map of the Horse Mountain Quadrangle, Garfield County, Colorado. Version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2003.