Ferryansyah and Izzatin, M. 2026. ANALYSIS OF STUDENTS’ UNDERSTANDING OF ALGEBRA CONCEPTS BASED ON APOS THEORY: A STUDY IN LINEAR ALGEBRA COURSES. Jurnal Penalaran dan Riset Matematika. 5, 1 (Apr. 2026), 20–31. DOI:https://doi.org/10.62388/prisma.v5i1.619.