1.
Soikudrua B, Nontapa R. A study of Mathematical Problem-solving Ability Using Problem-Based Learning of Grade 7th students. edurmu [internet]. 2024 Aug. 29 [cited 2026 Aug. 27];21(2):49-57. available from: https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/271605