KOBKHUNTOD, J.; JAINIM, P. .; PHUNGPHAE, P. DEVELOPMENT OF SOCIAL STUDIES TEACHING IN THE 21st CENTURY USING PROBLEM-BASED. PNRU Academic Journal, [S. l.], v. 2, n. 1, p. 36–46, 2023. Disponível em: https://so07.tci-thaijo.org/index.php/PNRU_ACA/article/view/1949. Acesso em: 21 may. 2024.