APA

Norman A. G., . (1950). Advances in agronomy : v.2. New York: Academic Press.

Chicago

Norman A G, . 1950. Advances in agronomy : v.2. New York: Academic Press.

Harvard

Norman A. G., . (1950). Advances in agronomy : v.2. New York: Academic Press.

MLA

Norman A G, . Advances in agronomy : v.2. New York: Academic Press. 1950.