APA (7th ed.) Citation

Clark, A. R. (2003). Vulnerability of ground water to contamination, northern Bexar County, Texas. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Clark, Amy R. Vulnerability of Ground Water to Contamination, Northern Bexar County, Texas. Austin, Tex.: U.S. Dept. of the Interior, U.S. Geological Survey, 2003.

MLA (9th ed.) Citation

Clark, Amy R. Vulnerability of Ground Water to Contamination, Northern Bexar County, Texas. U.S. Dept. of the Interior, U.S. Geological Survey, 2003.