APA (7th ed.) Zitazioa
ebrary, Inc, & de Ruyter, D. K. (2002). Research in e-service. Emerald Group Publishing.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, eta Dr. Ko de Ruyter. Research in E-service. Bradford, England: Emerald Group Publishing, 2002.
MLA (9th ed.) Zitazioa
ebrary, Inc, eta Dr. Ko de Ruyter. Research in E-service. Emerald Group Publishing, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.