Koopmans, T. C. (1957). Three essays on the state of economic science (Paperback edition.). McGraw-Hill.
芝加哥风格引文Koopmans, Tjalling C. Three Essays on the State of Economic Science. Paperback edition. New York: McGraw-Hill, 1957.
MLA引文Koopmans, Tjalling C. Three Essays on the State of Economic Science. Paperback edition. McGraw-Hill, 1957.
警告：这些引文格式不一定是100％准确.