NASHRULLAH, AKBAR; QOSYIM, AHMAD. MELATIHKAN KETERAMPILAN KOMUNIKASI SISWA SMP PADA MATERI PENCEMARAN LINGKUNGAN MENGGUNAKAN MODEL PROBLEM BASED LEARNING. PENSA: E-JURNAL PENDIDIKAN SAINS, [S. l.], v. 6, n. 02, 2018. Disponível em: https://ejournal.unesa.ac.id/index.php/pensa/article/view/24434. Acesso em: 10 jul. 2025.