RANIAH, R. PENINGKATAN AKTIVITAS DAN HASIL BELAJAR SISWA SMP MENGGUNAKAN MODEL PROBLEM BASED LEARNING. Jurnal Pijar: Pendidikan dan Pembelajaran, [S. l.], v. 2, n. 3, 2023. Disponível em: https://ejournal-leader.com/index.php/pijar/article/view/173. Acesso em: 20 sep. 2024.