APA (7th ed.) Citation

Irwin, W. P., & Wooden, J. L. (2001). Map showing plutons and accreted terranes of the Sierra Nevada, California, with a tabulation of U/Pb isotopic ages (Online version 1.0.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Irwin, W. P., and Joseph L. Wooden. Map Showing Plutons and Accreted Terranes of the Sierra Nevada, California, with a Tabulation of U/Pb Isotopic Ages. Online version 1.0. [Reston, Va.?]: U.S. Geological Survey, 2001.

MLA (9th ed.) Citation

Irwin, W. P., and Joseph L. Wooden. Map Showing Plutons and Accreted Terranes of the Sierra Nevada, California, with a Tabulation of U/Pb Isotopic Ages. Online version 1.0. U.S. Geological Survey, 2001.