Greenfield, J. (2001). Challenges of leadership: C E O exchange. Films Media Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreenfield, Jeff. Challenges of Leadership: C E O Exchange. Hamilton, NJ: Films Media Group, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGreenfield, Jeff. Challenges of Leadership: C E O Exchange. Films Media Group, 2001.
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