Greenberg, P. (2010). CRM At the Speed of Light (4th.). Tata McGraw Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGreenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
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