Muhammad Fuad Tiew, Nur Nadira Ashyikin, et al. “An Analysis of Students’ Understanding of Algebraic Concepts”. Jurnal Pendidikan Sains Dan Matematik Malaysia, vol. 13, no. 2, Nov. 2023, pp. 86-95, https://doi.org/10.37134/jpsmm.vol13.2.8.2023.