APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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