SOPA, Narongrit; SIRISOM, Poonsak; JAMPEEHOM, Ketsiri. English Language Competency Development of Tour Guides in Maha Sarakham Province in Preparation for the ASEAN Community by Integrating Three Concept-Centered Instructional Models and Using English in Actual Situations. African Journal of Pedagogy and Curriculum, [S. l.], v. 4, p. 95–101, 2017. DOI: 10.63569/6n87m238. Disponível em: https://www.ajopac.com/index.php/ajopac/article/view/40. Acesso em: 30 jun. 2025.