Nakavetin, A. . ., Klaysuwan, C. . ., Nawasamrit, I., Sukhanthachan, S. . ., & Janhom, W. . . (2020). Politeness Strategies of Airport Information Staff in Refusing Passengers’ Requests. Dusit Thani College Journal, 13(1), 218–235. Retrieved from https://so01.tci-thaijo.org/index.php/journaldtc/article/view/241014