APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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