Kohls, R. L., & Downey, W. D. (1972). Marketing of agricultural products. Macmillan.
芝加哥风格引文Kohls, Richard L., 与 W. David Downey. Marketing of Agricultural Products. New York: Macmillan, 1972.
MLA引文Kohls, Richard L., 与 W. David Downey. Marketing of Agricultural Products. Macmillan, 1972.
警告：这些引文格式不一定是100％准确.