Παραπομπή APA
United Nations International Comparison Project., & Kravis, I. B. (1975). A System of international comparisons of gross product and purchasing power. Baltimore: Published for World Bank by Johns Hopkins University Press.
Παραπομπή Chicago StyleUnited Nations International Comparison Project., and Irving B. Kravis. A System of International Comparisons of Gross Product and Purchasing Power. Baltimore: Published for World Bank by Johns Hopkins University Press, 1975.
Παραπομπή MLAUnited Nations International Comparison Project., and Irving B. Kravis. A System of International Comparisons of Gross Product and Purchasing Power. Baltimore: Published for World Bank by Johns Hopkins University Press, 1975.
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