Kravis, I. B., & Lipsey, R. E. (1966). Comparative prices of nonferrous metals in international trade, 1953-64. National Bureau of Economic Research.
Chicago-viite (17. p.)Kravis, Irving B., ja Robert E. Lipsey. Comparative Prices of Nonferrous Metals in International Trade, 1953-64. New York: National Bureau of Economic Research, 1966.
MLA-viite (9. p.)Kravis, Irving B., ja Robert E. Lipsey. Comparative Prices of Nonferrous Metals in International Trade, 1953-64. National Bureau of Economic Research, 1966.
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