KITTANAKAMJORN, T.; KONGWIJIT, P. The Development of Thai Language Principles Learning Achievement and Self-Concept of Matthayomsuksa 5 Students by Using Concept Development Model. An Online Journal of Education, [S. l.], v. 20, n. 2, p. 1–15, 2025. DOI: 10.14456/ojed.2025.26. Disponível em: https://so01.tci-thaijo.org/index.php/OJED/article/view/283570. Acesso em: 16 sep. 2026.