APA

Norman A. G., . (1949). Advances in Agronomy. New York: Academic Press.

Chicago

Norman A G, . 1949. Advances in Agronomy. New York: Academic Press.

Harvard

Norman A. G., . (1949). Advances in Agronomy. New York: Academic Press.

MLA

Norman A G, . Advances in Agronomy. New York: Academic Press. 1949.