Cita APA (7a ed.)

Hughes, H. D. M., & Metcalfe, D. S. (1972). Crop production (3d ed.). Macmillan.

Cita Chicago Style (17a ed.)

Hughes, Harold De Mott, y Darrel S. Metcalfe. Crop Production. 3d ed. New York: Macmillan, 1972.

Cita MLA (8a ed.)

Hughes, Harold De Mott, y Darrel S. Metcalfe. Crop Production. 3d ed. Macmillan, 1972.