APA (7 वां संस्करण) प्रशस्ति पत्र

Greenberg, P. (2010). CRM (Customer Relationship Management) at the Speed of Light (4th.). Tata McGraw Hill Education Private Limited.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Greenberg, Paul. CRM (Customer Relationship Management) at the Speed of Light. 4th. New Delhi: Tata McGraw Hill Education Private Limited, 2010.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Greenberg, Paul. CRM (Customer Relationship Management) at the Speed of Light. 4th. Tata McGraw Hill Education Private Limited, 2010.