Thoman, R. S., Conkling, E. C., & Yeates, M. (1968). The geography of economic activity. McGraw-Hill.
芝加哥风格引文Thoman, Richard S., Edgar C. Conkling, 与 Maurice Yeates. The Geography of Economic Activity. New York: McGraw-Hill, 1968.
MLA引文Thoman, Richard S., et al. The Geography of Economic Activity. McGraw-Hill, 1968.
警告：这些引文格式不一定是100％准确.