APA (7th ed.) Citation

National Water-Quality Assessment Program (U.S.) & Beisner, K. R. (2012). Maps of estimated nitrate and arsenic concentrations for basin-fill aquifers of the Southwestern United States. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

National Water-Quality Assessment Program (U.S.) and Kimberly R. Beisner. Maps of Estimated Nitrate and Arsenic Concentrations for Basin-fill Aquifers of the Southwestern United States. Reston, Va.: U.S. Department of the Interior, U.S. Geological Survey, 2012.

MLA (9th ed.) Citation

National Water-Quality Assessment Program (U.S.) and Kimberly R. Beisner. Maps of Estimated Nitrate and Arsenic Concentrations for Basin-fill Aquifers of the Southwestern United States. U.S. Department of the Interior, U.S. Geological Survey, 2012.