JUMRIANI, Jumriani. PENGEMBANGAN PERANGKAT MODEL DISCOVERY LEARNING DENGAN PENDEKATAN PROBLEM SOLVING PADA MATERI TRIGONOMETRI. Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika, [S. l.], v. 3, n. 1, p. 17–26, 2020. Disponível em: https://e-journal.my.id/proximal/article/view/323. Acesso em: 27 jul. 2025.