Kravis, I. B. (1975). A System of international comparisons of gross product and purchasing power. Johns Hopkins University Press for World Bank.
Citace podle Chicago (17th ed.)Kravis, Irving B. A System of International Comparisons of Gross Product and Purchasing Power. Baltimore: Johns Hopkins University Press for World Bank, 1975.
Citace podle MLA (9th ed.)Kravis, Irving B. A System of International Comparisons of Gross Product and Purchasing Power. Johns Hopkins University Press for World Bank, 1975.
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