APA aipamena

 Dubicka, I. (2009).  English for international tourism.  Longman.

Chicago Style aipamena

 Dubicka, Iwonna.  English for International Tourism.  Longman, 2009.

MLA aipamena

 Dubicka, Iwonna.  English for International Tourism.  Longman, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.