APA (7th ed.) Citation

Hall, M. D., Shaffer, M. J., & Waskom, R. M. (2001). Regional nitrate leaching variability: What makes a difference in northeastern Colorado. Journal of the American Water Resources Association, 37(1), 139.

Chicago Style (17th ed.) Citation

Hall, M. D., M. J. Shaffer, and R. M. Waskom. "Regional Nitrate Leaching Variability: What Makes a Difference in Northeastern Colorado." Journal of the American Water Resources Association 37, no. 1 (2001): 139.

MLA (9th ed.) Citation

Hall, M. D., et al. "Regional Nitrate Leaching Variability: What Makes a Difference in Northeastern Colorado." Journal of the American Water Resources Association, vol. 37, no. 1, 2001, p. 139.