1.
Kobkhuntod J, Jainim P, Phungphae P. DEVELOPMENT OF SOCIAL STUDIES TEACHING IN THE 21st CENTURY USING PROBLEM-BASED. PNRU_ACA [Internet]. 2023 Jun. 30 [cited 2024 May 21];2(1):36-4. Available from: https://so07.tci-thaijo.org/index.php/PNRU_ACA/article/view/1949