Husen, Sadam, and Jumroh. “STUDENTS’ MATHEMATICAL PROBLEM-SOLVING ABILITIES IN ALGEBRAIC EXPRESSIONS AT SMP NEGERI 48 PALEMBANG”. Perpendicular : Journal of Mathematics Education and Learning, vol. 1, no. 1, Mar. 2025, pp. 21-30, https://doi.org/10.61994/perpendicular.v1i1.908.