APA (7th ed.) Zitazioa
Payne Adrian. The essence of services marketing.
Chicago Style (17th ed.) Zitazioa
Payne Adrian. The Essence of Services Marketing.
MLA (9th ed.) Zitazioa
Payne Adrian. The Essence of Services Marketing.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.