M. . Melita R. Jemalu, R. Rusno, and U. Yudiono, “Perbandingan model problem based learning (PBL) dan model pembelajaran konvensional terhadap hasil belajar IPS terpadu siswa SMP Negeri 6 Welak”, JRPE, vol. 6, no. 2, pp. 71–85, Oct. 2021.