APA (7th ed.) Citation

Ketner, K. B. (2009). Mid-Permian Phosphoria Sea in Nevada and the upwelling model. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ketner, Keith B. Mid-Permian Phosphoria Sea in Nevada and the Upwelling Model. Reston, Va.: U.S. Geological Survey, 2009.

MLA (9th ed.) Citation

Ketner, Keith B. Mid-Permian Phosphoria Sea in Nevada and the Upwelling Model. U.S. Geological Survey, 2009.

Warning: These citations may not always be 100% accurate.