HARVARD BUSINESS SCHOOL. (1998). HARVARD BUSINESS REVIEW ON LEADERSHIP. H B S.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHARVARD BUSINESS SCHOOL. HARVARD BUSINESS REVIEW ON LEADERSHIP. U S A: H B S, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHARVARD BUSINESS SCHOOL. HARVARD BUSINESS REVIEW ON LEADERSHIP. H B S, 1998.
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