MAYASARI, S.; AKROM, A. PENINGKATAN HASIL BELAJAR IPS PADA MATERI KERJA SAMA Dl LINGKUNGAN SEKOLAH MELALUI MODEL PROBLEM BASED INSTRUCTION. Ibtida’i : Jurnal Kependidikan Dasar, [S. l.], v. 4, n. 2, p. 227–238, 2017. DOI: 10.32678/ibtidai.v4i02.8146. Disponível em: https://ftk.uinbanten.ac.id/journals/index.php/ibtidai/article/view/8146. Acesso em: 7 jul. 2025.