APA (7th ed.) Citation

Geological Survey (U.S.) & Pierce, B. S. (2001). The U.S. Geological Survey National Coal Resource Assessment. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Brenda S. Pierce. The U.S. Geological Survey National Coal Resource Assessment. [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey: [publisher not identified], 2001.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Brenda S. Pierce. The U.S. Geological Survey National Coal Resource Assessment. [publisher not identified], 2001.