APA (7 वां संस्करण) प्रशस्ति पत्र

Greenberg, P. (2004). CRM at the Speed of Light (3rd.). Tata Mcgraw Hill pub. co.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Greenberg, Paul. CRM at the Speed of Light. 3rd. New Dehli: Tata Mcgraw Hill pub. co, 2004.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Greenberg, Paul. CRM at the Speed of Light. 3rd. Tata Mcgraw Hill pub. co, 2004.