TUNGKAEW, S. Development of Online Manual and Evaluation of Use of English for Communication of Front Desk Staff, Hotel Business in Muang District, Uttaradit Province. Interdisciplinary Academic and Research Journal , Maha Sara Kham, TH., v. 6, n. 2, p. e290221, 2026. DOI: 10.60027/iarj.2026.e290221. Disponível em: https://so03.tci-thaijo.org/index.php/IARJ/article/view/290221. Acesso em: 16 sep. 2026.