APA aipamena

Dubicka, I., & O'Keeffe, M. (2013). English for international tourism: Pre-Intermediate coursebook. England: Pearson.

Chicago Style aipamena

Dubicka, Iwonna, và Margaret O'Keeffe. English for International Tourism: Pre-Intermediate Coursebook. England: Pearson, 2013.

MLA aipamena

Dubicka, Iwonna, và Margaret O'Keeffe. English for International Tourism: Pre-Intermediate Coursebook. England: Pearson, 2013.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.