Mourkogiannis Nikos. (2006). Purpose: The starting point of great companies. Palgrave , Macmllian & Purpose Publisher.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMourkogiannis Nikos. Purpose: The Starting Point of Great Companies. NewYork: Palgrave , Macmllian & Purpose Publisher, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMourkogiannis Nikos. Purpose: The Starting Point of Great Companies. Palgrave , Macmllian & Purpose Publisher, 2006.
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