APA (7th ed.) Zitazioa
Powers, T. (1990). Marketing hospitality (1a. ed.). Wiley Service Management Series.
Chicago Style (17th ed.) Zitazioa
Powers, Tom. Marketing Hospitality. 1a. ed. USA: Wiley Service Management Series, 1990.
MLA (9th ed.) Zitazioa
Powers, Tom. Marketing Hospitality. 1a. ed. Wiley Service Management Series, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.