PITRIANI. PROBLEM BASED LEARNING BERBANTUAN CABRI 3D UNTUK MENINGKATKAN HABIT OF THINKING FLEXIBLY SISWA SMA. Nabla Dewantara: Jurnal Pendidikan Matematika, [S. l.], v. 1, n. 2, 2016. Disponível em: https://ejournal.unitaspalembang.ac.id/index.php/nabla/article/view/499. Acesso em: 11 jan. 2026.