Johnston, R. J. (1976). The world trade system: Some enquiries into its spatial structure. St. Martin's Press.
芝加哥风格引文Johnston, Ronald John. The World Trade System: Some Enquiries into Its Spatial Structure. New York: St. Martin's Press, 1976.
MLA引文Johnston, Ronald John. The World Trade System: Some Enquiries into Its Spatial Structure. St. Martin's Press, 1976.
警告：这些引文格式不一定是100％准确.