Greenberg, P. (2010). CRM At the Speed of Light (4th.). Tata McGraw Hill.
Čikaški stil citiranja (17. izdanje)Greenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
MLA način citiranja (9. izdanje)Greenberg, Paul. CRM At the Speed of Light. 4th. Tata McGraw Hill, 2010.
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