PHUMPHO, R.; NOMNIAN, S. Challenges for Thai business people using English in ASEAN. Kasetsart Journal of Social Sciences, [S. l.], v. 40, n. 3, p. 743–750, 2019. Disponível em: https://so04.tci-thaijo.org/index.php/kjss/article/view/242345. Acesso em: 16 sep. 2026.