Long, A. E., Brown, J. G., & Gellenbeck, D. J. (1997). Statistical analysis of nitrate in ground water, west Salt River Valley, Arizona. U.S. Geological Survey.
Chicago Style (17th ed.) CitationLong, A. E., James G. Brown, and D. J. Gellenbeck. Statistical Analysis of Nitrate in Ground Water, West Salt River Valley, Arizona. Tucson, Arizona: U.S. Geological Survey, 1997.
MLA (9th ed.) CitationLong, A. E., et al. Statistical Analysis of Nitrate in Ground Water, West Salt River Valley, Arizona. U.S. Geological Survey, 1997.
Warning: These citations may not always be 100% accurate.