Greenberg, P. (2001). CRM at the speed of light: Capturing and keeping customers in internet real time. TMH.
Citace podle Chicago (17th ed.)Greenberg, Paul. CRM at the Speed of Light: Capturing and Keeping Customers in Internet Real Time. New delhi: TMH, 2001.
Citace podle MLA (9th ed.)Greenberg, Paul. CRM at the Speed of Light: Capturing and Keeping Customers in Internet Real Time. TMH, 2001.
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