Sumadi, Suhartini. “Problematika Pembelajaran Matematika Kelas VIII Ditinjau Dari Minat Belajar Siswa”. THEOREMA: The Journal Education of Mathematics 2, no. 1 (November 2, 2021). Accessed April 25, 2025. https://e-journal.unimudasorong.ac.id/index.php/jurnaltheorema/article/view/1101.