Cita APA

Dubicka, I., & O'Keeffe, M. (2008). English for international tourism: Pre-intermediate (8. ed.). England: Pearson education.

Citación estilo Chicago

Dubicka, Iwonna, y Margaret O'Keeffe. English for International Tourism: Pre-intermediate. 8. ed. England: Pearson education, 2008.

Cita MLA

Dubicka, Iwonna, y Margaret O'Keeffe. English for International Tourism: Pre-intermediate. 8. ed. England: Pearson education, 2008.