Unnahasuttiyanon, Nantiya. “English Oral Communication Problems and Strategies Used by Thai Reservation and Ticketing Agents”. The International Journal of Humanities & Social Studies 8, no. 3 (March 31, 2020). Accessed July 22, 2024. https://internationaljournalcorner.com/index.php/theijhss/article/view/151821.