SRI MENDA TARIGAN, I.; TARIGAN, S. Pengaruh Model Pembelajaran Problem Based Learning (PBL) Terhadap Peningkatan Hasil Belajar IPA Siswa Pada Materi Pencemaran Lingkungan Kelas VII SMP Negeri 1 Tigalingga . Jurnal Adijaya Multidisplin, [S. l.], v. 1, n. 03, p. 507–514, 2023. Disponível em: https://e-journal.naureendigition.com/index.php/jam/article/view/239. Acesso em: 18 apr. 2026.