APA (7th ed.) Zitazioa
(1997). EUROPEAN TRIPS: WHO TAKES WHAT WHERE.
Chicago Style (17th ed.) Zitazioa
EUROPEAN TRIPS: WHO TAKES WHAT WHERE. 1997.
MLA (9th ed.) Zitazioa
EUROPEAN TRIPS: WHO TAKES WHAT WHERE. 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.