Cita APA (7th ed.)
Dubicka, I., & O' Keeffe, M. (2003). English for international tourism: Pre-intermediate (1a. ed.). Longman.
Cita Chicago (17th ed.)
Dubicka, Iwonna, i Margaret O' Keeffe. English for International Tourism: Pre-intermediate. 1a. ed. Edinburgo: Longman, 2003.
Cita MLA (9th ed.)
Dubicka, Iwonna, i Margaret O' Keeffe. English for International Tourism: Pre-intermediate. 1a. ed. Longman, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.