Sparks, D. L. (2001). Advances in agronomy. San Diego: Academic Press.
Trích dẫn kiểu ChicagoSparks, Donald L. Advances in Agronomy. San Diego: Academic Press, 2001.
MLA引文Sparks, Donald L. Advances in Agronomy. San Diego: Academic Press, 2001.
警告:这些引文格式不一定是100%准确.