Cita APA (7a ed.)

Dubicka, I., & O´Keeffe, M. (2007). English for International Tourism Pre-Intermediate. Pearson Educación ; Longman.

Cita Chicago Style (17a ed.)

Dubicka, Iwonna, y Margaret O´Keeffe. English for International Tourism Pre-Intermediate. Mexico: Pearson Educación ; Longman, 2007.

Cita MLA (8a ed.)

Dubicka, Iwonna, y Margaret O´Keeffe. English for International Tourism Pre-Intermediate. Pearson Educación ; Longman, 2007.