Cita APA (7th ed.)

Leonard, W. H., & Martin, J. H. (1963). Cereal crops. The Macmillan.

Cita Chicago (17th ed.)

Leonard, Warren H., i John Holmes Martin. Cereal Crops. Nueva York: The Macmillan, 1963.

Cita MLA (9th ed.)

Leonard, Warren H., i John Holmes Martin. Cereal Crops. The Macmillan, 1963.