APA (7th ed.) Citation

Irwin, W. P. (2010). Reconnaissance geologic map of the Hayfork 15ʹ quadrangle, Trinity County, California. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Irwin, W. P. Reconnaissance Geologic Map of the Hayfork 15ʹ Quadrangle, Trinity County, California. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2010.

MLA (9th ed.) Citation

Irwin, W. P. Reconnaissance Geologic Map of the Hayfork 15ʹ Quadrangle, Trinity County, California. U.S. Dept. of the Interior, U.S. Geological Survey, 2010.