CUNNINGHAM M J. (2002). CUSTOMER RELATIONSHIP MANAGEMENT. CAPSTONE.
Chicago Style aipamenaCUNNINGHAM M J. CUSTOMER RELATIONSHIP MANAGEMENT. U K: CAPSTONE, 2002.
MLA aipamenaCUNNINGHAM M J. CUSTOMER RELATIONSHIP MANAGEMENT. CAPSTONE, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.