APA (7th ed.) Citation

National Water-Quality Assessment Program (U.S.), Geological Survey (U.S.), & Gurdak, J. J. (2009). Water quality in the High Plains Aquifer, Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1999-2004. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

National Water-Quality Assessment Program (U.S.), Geological Survey (U.S.), and Jason J. Gurdak. Water Quality in the High Plains Aquifer, Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1999-2004. Reston, Va.: U.S. Geological Survey, 2009.

MLA (9th ed.) Citation

National Water-Quality Assessment Program (U.S.), et al. Water Quality in the High Plains Aquifer, Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1999-2004. U.S. Geological Survey, 2009.