APA (7th ed.) Citation

Geological Survey (U.S.) & Ellis, M. S. (2002). Evaluation of economically extractable coal beds in the Gillette coal field, Powder River Basin, Wyoming and Montana (Version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Margaret S. Ellis. Evaluation of Economically Extractable Coal Beds in the Gillette Coal Field, Powder River Basin, Wyoming and Montana. Version 1.0. [Denver, Colo.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Margaret S. Ellis. Evaluation of Economically Extractable Coal Beds in the Gillette Coal Field, Powder River Basin, Wyoming and Montana. Version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.