APA (7th ed.) Citation

Dodge, C. H. (1985). Coal resources of Butler County, Pennsylvania. Pennsylvania Geological Survey.

Chicago Style (17th ed.) Citation

Dodge, Clifford H. Coal Resources of Butler County, Pennsylvania. Harrisburg: Pennsylvania Geological Survey, 1985.

MLA (9th ed.) Citation

Dodge, Clifford H. Coal Resources of Butler County, Pennsylvania. Pennsylvania Geological Survey, 1985.

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