APA (7th ed.) Citation

Exner, M. E., Hirsh, A. J., & Spalding, R. F. (2014). Nebraska's groundwater legacy: Nitrate contamination beneath irrigated cropland. Water resources research, 50(5), 4474-4489. https://doi.org/10.1002/2013WR015073

Chicago Style (17th ed.) Citation

Exner, Mary E., Aaron J. Hirsh, and Roy F. Spalding. "Nebraska's Groundwater Legacy: Nitrate Contamination Beneath Irrigated Cropland." Water Resources Research 50, no. 5 (2014): 4474-4489. https://doi.org/10.1002/2013WR015073.

MLA (9th ed.) Citation

Exner, Mary E., et al. "Nebraska's Groundwater Legacy: Nitrate Contamination Beneath Irrigated Cropland." Water Resources Research, vol. 50, no. 5, 2014, pp. 4474-4489, https://doi.org/10.1002/2013WR015073.