Não informado. Studies in economics and political science. London School of Economics and Political Science.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Studies in Economics and Political Science. London: London School of Economics and Political Science.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Studies in Economics and Political Science. London School of Economics and Political Science.
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