APA (7th ed.) Citation

Murphy, J., Hirsch, R. M., & Sprague, L. A. (2013). Nitrate in the Mississippi River and its tributaries, 1980-2010: An update. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Murphy, Jennifer, Robert M. Hirsch, and Lori A. Sprague. Nitrate in the Mississippi River and Its Tributaries, 1980-2010: An Update. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2013.

MLA (9th ed.) Citation

Murphy, Jennifer, et al. Nitrate in the Mississippi River and Its Tributaries, 1980-2010: An Update. U.S. Department of the Interior, U.S. Geological Survey, 2013.