Wahyuni, Astri, dan Lilis Marina Angraini. “Development of Learning Material Based on Troubleshooting at Aljabar Linear Lectures”. Math Didactic: Jurnal Pendidikan Matematika 5, no. 3 (Desember 30, 2019): 287-295. Diakses Juli 3, 2025. https://jurnal.stkipbjm.ac.id/index.php/math/article/view/785.