Cita APA (7a ed.)

Martin, J. H., & Leonard, W. H. (1967). Principles of field crop production (2d ed.). Macmillan.

Cita Chicago Style (17a ed.)

Martin, John H., y Warren H. Leonard. Principles of Field Crop Production. 2d ed. New York,: Macmillan, 1967.

Cita MLA (8a ed.)

Martin, John H., y Warren H. Leonard. Principles of Field Crop Production. 2d ed. Macmillan, 1967.