COOK SARAH. (2000). CUSTOMER CARE: HOW TO CREATE AN EFFECTIVE CUSTOMER FOCUS (3RD.). KOGAN PAGE.
Chicago Style aipamenaCOOK SARAH. CUSTOMER CARE: HOW TO CREATE AN EFFECTIVE CUSTOMER FOCUS. 3RD. LONDON: KOGAN PAGE, 2000.
MLA aipamenaCOOK SARAH. CUSTOMER CARE: HOW TO CREATE AN EFFECTIVE CUSTOMER FOCUS. 3RD. KOGAN PAGE, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.