APA (7th ed.) Zitazioa
Dubicka, I., & O{candra}Keeffe, M. (2003). English for international tourism: Pre-intermediate studensb̐ook. Pearson Educacio<U+00CC><U+0081>n.
Chicago Style (17th ed.) Zitazioa
Dubicka, Iwonna, eta Margaret O{candra}Keeffe. English for International Tourism: Pre-intermediate Studensb̐ook. England: Pearson Educacio<U+00CC><U+0081>n, 2003.
MLA (9th ed.) Zitazioa
Dubicka, Iwonna, eta Margaret O{candra}Keeffe. English for International Tourism: Pre-intermediate Studensb̐ook. Pearson Educacio<U+00CC><U+0081>n, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.