1.
Wonginta A, Pavaputanon L. The Study of Grade 8 Students’ Algebraic Thinking in Solving Problems of Factoring One Variable Polnomials of Degree 2. JILS [internet]. 2018 Sep. 28 [cited 2026 Sep. 13];12(3):1-9. available from: https://so02.tci-thaijo.org/index.php/EDGKKUJ/article/view/241791