Greenberg, P. (2010). CRM At the Speed of Light (4th.). Tata McGraw Hill.
Chicago-čujuhus (17. p.)Greenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
MLA-čujuhus (9. p.)Greenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.