APA (7th ed.) Citation

Bird, P. H. (1998). Geohydrology and ground-water quality of Warwick Township, Bucks County, Pennsylvania. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Bird, Philip H. Geohydrology and Ground-water Quality of Warwick Township, Bucks County, Pennsylvania. Lemoyne Pennsylvania: U.S. Department of the Interior, U.S. Geological Survey, 1998.

MLA (9th ed.) Citation

Bird, Philip H. Geohydrology and Ground-water Quality of Warwick Township, Bucks County, Pennsylvania. U.S. Department of the Interior, U.S. Geological Survey, 1998.