APA (7th ed.) Citation

Tortorelli, R. L. (2008). Nutrient concentrations, loads, and yields in the Eucha-Spavinaw basin, Arkansas and Oklahoma, 2002-2006. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Tortorelli, Robert L. Nutrient Concentrations, Loads, and Yields in the Eucha-Spavinaw Basin, Arkansas and Oklahoma, 2002-2006. Reston, Va.: U.S. Geological Survey, 2008.

MLA (9th ed.) Citation

Tortorelli, Robert L. Nutrient Concentrations, Loads, and Yields in the Eucha-Spavinaw Basin, Arkansas and Oklahoma, 2002-2006. U.S. Geological Survey, 2008.