RAMADHAN, I. Penggunaan Metode Problem Based Learning dalam meningkatkan keaktifan belajar siswa pada kelas XI IPS 1 . Cetta: Jurnal Ilmu Pendidikan, [S. l.], v. 4, n. 3, p. 358–369, 2021. DOI: 10.37329/cetta.v4i3.1352. Disponível em: https://jayapanguspress.penerbit.org/index.php/cetta/article/view/1352. Acesso em: 14 apr. 2024.