Pengaruh Problem Based Instruction Berbasis Contextual Teaching and Learning Terhadap Hasil Belajar Materi Pencemaran Lingkungan di SMP Negeri 6 Tondano. SCIENING : Science Learning Journal, [S. l.], v. 5, n. 2, p. 147 153, 2024. DOI: 10.53682/slj.v5i2.10326. Disponível em: https://ejurnal.unima.ac.id/index.php/sciening/article/view/10326. Acesso em: 25 feb. 2026.