Greenberg, P. (2010). CRM At the Speed of Light (4th.). Tata McGraw Hill.
Cita Chicago (17th ed.)Greenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
Cita MLA (9th ed.)Greenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.