APA (7th ed.) Citation

Evarts, R. C. (2006). Geologic map of the Yacolt quadrangle, Clark County, Washington (Version 1.0, June 19, 2006.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Evarts, Russell C. Geologic Map of the Yacolt Quadrangle, Clark County, Washington. Version 1.0, June 19, 2006. [Reston, Va.]: U.S. Geological Survey, 2006.

MLA (9th ed.) Citation

Evarts, Russell C. Geologic Map of the Yacolt Quadrangle, Clark County, Washington. Version 1.0, June 19, 2006. U.S. Geological Survey, 2006.