Hempel, E. H. (1939). The economics of chemical industries. Wiley.
芝加哥风格引文Hempel, Edward Henry. The Economics of Chemical Industries. New York: Wiley, 1939.
MLA引文Hempel, Edward Henry. The Economics of Chemical Industries. Wiley, 1939.
警告：这些引文格式不一定是100％准确.