Gosney, J. W. B. (2010). Customer relationship management essentials (3 edition.).
Chicago Stili AlıntıGosney, John W; Boehm. Customer Relationship Management Essentials. 3 edition. Galgotia Pub: New Delhi, 2010.
MLA AlıntıGosney, John W; Boehm. Customer Relationship Management Essentials. 3 edition. 2010.
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