APA
Bergeron B., . (2002). Essentials of CRM : a guide to customer relationship management. John Wiley, New York: .
Chicago
Bergeron Bryan, . 2002. Essentials of CRM : a guide to customer relationship management. John Wiley, New York: .
Harvard
Bergeron B., . (2002). Essentials of CRM : a guide to customer relationship management. John Wiley, New York: .
MLA
Bergeron Bryan, . Essentials of CRM : a guide to customer relationship management. John Wiley, New York: . 2002.