APA (7th ed.) Citation

United States. Bureau of Mines & United States. Energy Information Administration. Pennsylvania anthracite distribution. U.S. Dept. of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

United States. Bureau of Mines and United States. Energy Information Administration. Pennsylvania Anthracite Distribution. Washington: U.S. Dept. of the Interior, Bureau of Mines.

MLA (8th ed.) Citation

United States. Bureau of Mines and United States. Energy Information Administration. Pennsylvania Anthracite Distribution. U.S. Dept. of the Interior, Bureau of Mines.

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