APA (7th ed.) Citation

Luppens, J. A. (2008). Assessment of coal geology, resources, and reserves in the Gillette coalfield, Powder River Basin, Wyoming. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Luppens, James A. Assessment of Coal Geology, Resources, and Reserves in the Gillette Coalfield, Powder River Basin, Wyoming. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2008.

MLA (9th ed.) Citation

Luppens, James A. Assessment of Coal Geology, Resources, and Reserves in the Gillette Coalfield, Powder River Basin, Wyoming. U.S. Department of the Interior, U.S. Geological Survey, 2008.