APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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