Kravis, I. B., & Lipsey, R. E. (1966). Comparative prices of nonferrous metals in international trade, 1953-64. National Bureau of Economic Research.
芝加哥风格引文Kravis, Irving B., 与 Robert E. Lipsey. Comparative Prices of Nonferrous Metals in International Trade, 1953-64. New York: National Bureau of Economic Research, 1966.
MLA引文Kravis, Irving B., 与 Robert E. Lipsey. Comparative Prices of Nonferrous Metals in International Trade, 1953-64. National Bureau of Economic Research, 1966.
警告：这些引文格式不一定是100％准确.