Whetham, E. H. (1972). Agricultural marketing in Africa. Oxford University Press.
芝加哥风格引文Whetham, Edith H. Agricultural Marketing in Africa. London: Oxford University Press, 1972.
MLA引文Whetham, Edith H. Agricultural Marketing in Africa. Oxford University Press, 1972.
警告：这些引文格式不一定是100％准确.