APA (7th ed.) Citation

Geological Survey (U.S.). (1989). Water-resources activities of the U.S. Geological Survey in Pennsylvania. U.S. Geological Survey, Water Resources Division, Pennsylvania District.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Water-resources Activities of the U.S. Geological Survey in Pennsylvania. Harrisburg, Pennsylvania: U.S. Geological Survey, Water Resources Division, Pennsylvania District, 1989.

MLA (9th ed.) Citation

Geological Survey (U.S.). Water-resources Activities of the U.S. Geological Survey in Pennsylvania. U.S. Geological Survey, Water Resources Division, Pennsylvania District, 1989.