APA (7th ed.) Citation

Gregory, P. J., & George, T. S. (2011). Feeding nine billion: The challenge to sustainable crop production. Journal of experimental botany, 62(15), 5233-5239. https://doi.org/10.1093/jxb/err232

Chicago Style (17th ed.) Citation

Gregory, Peter J., and Timothy S. George. "Feeding Nine Billion: The Challenge to Sustainable Crop Production." Journal of Experimental Botany 62, no. 15 (2011): 5233-5239. https://doi.org/10.1093/jxb/err232.

MLA (9th ed.) Citation

Gregory, Peter J., and Timothy S. George. "Feeding Nine Billion: The Challenge to Sustainable Crop Production." Journal of Experimental Botany, vol. 62, no. 15, 2011, pp. 5233-5239, https://doi.org/10.1093/jxb/err232.