Grennes, T., Johnson, P. R., & Thursby, M. (1978). The economics of world grain trade. Praeger.
芝加哥风格引文Grennes, Thomas, Paul R. Johnson, 与 Marie Thursby. The Economics of World Grain Trade. New York: Praeger, 1978.
MLA引文Grennes, Thomas, et al. The Economics of World Grain Trade. Praeger, 1978.
警告：这些引文格式不一定是100％准确.