Não informado. (1961). The Quarterly review of economics and business. University of Illinois, Bureau of Economic and Business Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Quarterly Review of Economics and Business. Champaign, Ill: University of Illinois, Bureau of Economic and Business Research, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Quarterly Review of Economics and Business. University of Illinois, Bureau of Economic and Business Research, 1961.
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