HAMEL GARY. (2002). COMPETING FOR THE FUTURE. TATA MCGRAW-HILL PUBLISHING COMPANY.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHAMEL GARY. COMPETING FOR THE FUTURE. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHAMEL GARY. COMPETING FOR THE FUTURE. TATA MCGRAW-HILL PUBLISHING COMPANY, 2002.
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