Gibson-Odgers, P. (2008). The world of customer service. Mason, Ohio: Thomson.
Chicago Style aipamenaGibson-Odgers, Pattie. The World of Customer Service. Mason, Ohio: Thomson, 2008.
MLA aipamenaGibson-Odgers, Pattie. The World of Customer Service. Mason, Ohio: Thomson, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.