Greenberg, P. (2004). CRM at the Speed of Light (3rd.). Tata Mcgraw Hill pub. co.
Chicago Style (17. basım) AtıfGreenberg, Paul. CRM at the Speed of Light. 3rd. New Dehli: Tata Mcgraw Hill pub. co, 2004.
MLA (9th ed.) AtıfGreenberg, Paul. CRM at the Speed of Light. 3rd. Tata Mcgraw Hill pub. co, 2004.
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