Sarobol, Preedok, and Manit Asanok. 2024. “Development of Blended Problem-Based Learning to Enhance Problem-Solving Ability and Academic Achievement of Undergraduate Students”. Journal for Developing the Social and Community 11 (2). Bangkok, Thailand:405-20. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/278885.