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