Hughes, H. D. M., & Metcalfe, D. S. (1972). Crop production (3d ed.). Macmillan.
芝加哥风格引文Hughes, Harold De Mott, 与 Darrel S. Metcalfe. Crop Production. 3d ed. New York: Macmillan, 1972.
MLA引文Hughes, Harold De Mott, 与 Darrel S. Metcalfe. Crop Production. 3d ed. Macmillan, 1972.
警告：这些引文格式不一定是100％准确.