Upton, M. (1996). The economics of tropical farming systems. Cambridge University Press.
芝加哥风格引文Upton, Martin. The Economics of Tropical Farming Systems. Cambridge ; New York: Cambridge University Press, 1996.
MLA引文Upton, Martin. The Economics of Tropical Farming Systems. Cambridge University Press, 1996.
警告：这些引文格式不一定是100％准确.