APA citiranje

Dubicka, I., & O'Keeffe, M. (2003). English for international tourism: Pre-Intermediate students' book. England: Pearson.

Trích dẫn kiểu Chicago

Dubicka, Iwonna, và Margaret O'Keeffe. English for International Tourism: Pre-Intermediate Students' Book. England: Pearson, 2003.

MLA citiranje

Dubicka, Iwonna, và Margaret O'Keeffe. English for International Tourism: Pre-Intermediate Students' Book. England: Pearson, 2003.