Greenberg, Paul. CRM at the speed of light, Third edition : essential customer strategies for the 21st century / by Paul Greenberg. - / . - New Delhi : Tata McGraw-Hill Publishing , 2008. - 659p. : figures ; 24cm . Includes index ISBN: 9780070590571 RS550.00 Subjects--Index Terms: MANAGEMENT Dewey Class. No.: 658.812 / GRE/C