1.
Chanmarlee B, พานทอง ก, Pradujprom P. Enhancing Math Problem Solving Skills and Working Memory of Grade 3 Students using a Problem-based Learning Method Together with the Application of Abstract Code Model. JPR [internet]. 2024 Apr. 28 [cited 2026 Sep. 15];7(1):หน้า 486 - 503. available from: https://so03.tci-thaijo.org/index.php/JPR/article/view/275275