Kravis, I. B. (1975). A System of international comparisons of gross product and purchasing power. Johns Hopkins University Press for World Bank.
芝加哥风格引文Kravis, Irving B. A System of International Comparisons of Gross Product and Purchasing Power. Baltimore: Johns Hopkins University Press for World Bank, 1975.
MLA引文Kravis, Irving B. A System of International Comparisons of Gross Product and Purchasing Power. Johns Hopkins University Press for World Bank, 1975.
警告：这些引文格式不一定是100％准确.