Não informado. (1961). The Quarterly review of economics and business. University of Illinois, Bureau of Economic and Business Research.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. The Quarterly Review of Economics and Business. Champaign, Ill: University of Illinois, Bureau of Economic and Business Research, 1961.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. The Quarterly Review of Economics and Business. University of Illinois, Bureau of Economic and Business Research, 1961.
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