APA (7th ed.) Citation

Geological Survey (U.S.). (1998). Federal coal in the United States: A digital database of coal ownership status. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Federal Coal in the United States: A Digital Database of Coal Ownership Status. [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey: [publisher not identified], 1998.

MLA (9th ed.) Citation

Geological Survey (U.S.). Federal Coal in the United States: A Digital Database of Coal Ownership Status. [publisher not identified], 1998.