APA (7th ed.) Citation

Goolsby, D. A., Coupe, R. C., & Markovchick, D. J. (1991). Distribution of selected herbicides and nitrate in the Mississippi River and its major tributaries, April through June 1991. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Goolsby, D. A., R. C. Coupe, and D. J. Markovchick. Distribution of Selected Herbicides and Nitrate in the Mississippi River and Its Major Tributaries, April Through June 1991. Denver, Colorado: U.S. Geological Survey, 1991.

MLA (9th ed.) Citation

Goolsby, D. A., et al. Distribution of Selected Herbicides and Nitrate in the Mississippi River and Its Major Tributaries, April Through June 1991. U.S. Geological Survey, 1991.