NAVARUTTANAPORN, S. Developing the Instructional Self-learning Media of English Speaking Skills for Hotel Front Office Staff in Muang District, Loei Province. Research and Development Journal, Loei Rajabhat University, [S. l.], v. 16, n. 55, p. 105–116, 2021. Disponível em: https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/243744. Acesso em: 1 oct. 2026.