Patton, C. J., & Kryskalla, J. R. (2003). Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory: Evaluation of alkaline persulfate digestion as an alternative to Kjeldahl digestion for determination of total and dissolved nitrogen and phosphorus in water. U.S. Dept. of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationPatton, Charles J., and Jennifer R. Kryskalla. Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory: Evaluation of Alkaline Persulfate Digestion as an Alternative to Kjeldahl Digestion for Determination of Total and Dissolved Nitrogen and Phosphorus in Water. Denver, Colo.: U.S. Dept. of the Interior, U.S. Geological Survey, 2003.
MLA (9th ed.) CitationPatton, Charles J., and Jennifer R. Kryskalla. Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory: Evaluation of Alkaline Persulfate Digestion as an Alternative to Kjeldahl Digestion for Determination of Total and Dissolved Nitrogen and Phosphorus in Water. U.S. Dept. of the Interior, U.S. Geological Survey, 2003.