Aunthongsiri S, Hajisalah S, Janjaroon A, Piasai K. A Study of Matthayomsuksa II Students’ Geometric Proof Abilities in a Topic of Geometric Reasoning through Learning Activities with Graphic Organizer and Inquiry Process. rpujournal [Internet]. 2021 Aug. 25 [cited 2024 Apr. 20];7(2):125-39. Available from: https://so03.tci-thaijo.org/index.php/rpu/article/view/254780