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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIE Business Cases. Happiness at Work? R and the Organization of the 21st Century. [S.l.]: Instituto de Empresa SL, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIE Business Cases. Happiness at Work? R and the Organization of the 21st Century. Instituto de Empresa SL, 2011.
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