Não informado. (1987). AEI economist. American Enterprise Institute for Public Policy Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. AEI Economist. Washington: American Enterprise Institute for Public Policy Research, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. AEI Economist. American Enterprise Institute for Public Policy Research, 1987.
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