Martin, J. H., & Leonard, W. H. (1949). Principles of field crop production. Macmillan.
芝加哥风格引文Martin, John H., 与 Warren H. Leonard. Principles of Field Crop Production. New York: Macmillan, 1949.
MLA引文Martin, John H., 与 Warren H. Leonard. Principles of Field Crop Production. Macmillan, 1949.
警告：这些引文格式不一定是100％准确.