APA (7th ed.) Citation

Geological Survey (U.S.). (1999). USGS international activities in coal resources. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). USGS International Activities in Coal Resources. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1999.

MLA (9th ed.) Citation

Geological Survey (U.S.). USGS International Activities in Coal Resources. U.S. Dept. of the Interior, U.S. Geological Survey, 1999.

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