Makkar, U. (2012). Customer relationship management. Tata McGraw Hill Education.
Chicago Style aipamenaMakkar, Urvashi. Customer Relationship Management. New Delhi: Tata McGraw Hill Education, 2012.
MLA aipamenaMakkar, Urvashi. Customer Relationship Management. Tata McGraw Hill Education, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.