APA (7th ed.) Zitazioa
Laws, E. (2004). Improving tourism and hospitality services. Cabi Pub..
Chicago Style (17th ed.) Zitazioa
Laws, Eric. Improving Tourism and Hospitality Services. Cambridge, MA: Cabi Pub., 2004.
MLA (9th ed.) Zitazioa
Laws, Eric. Improving Tourism and Hospitality Services. Cabi Pub., 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.