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. Journal of Humanities and Social Sciences, Rajapruk University, v. 7, n. 2, p. 125-139, 25 Aug. 2021.