FIRMANSYAH B; UMAR, Ali. Pengembangan Tes Diagnostik Two-Tier: Mengidentifikasi Pemahaman Konseptual dan Prosedural Materi Prasyarat Struktur Aljabar Grup. THEOREMA: The Journal Education of Mathematics, [S. l.], v. 6, n. 2, 2025. Disponível em: https://e-journal.unimudasorong.ac.id/index.php/jurnaltheorema/article/view/4315. Acesso em: 10 jan. 2026.