APRILIA, W.; APREASTA, L.; PRASETYO, D. E. Pengembangan Buku Ajar Berbasis Model Problem Based Learning pada Subtema 1 Kekayaan Sumber Energi Di Indonesia pada kelas IV Sekolah Dasar. Innovative: Journal Of Social Science Research, [S. l.], v. 1, n. 2, p. 48–54, 2021. DOI: 10.31004/innovative.v1i2.2084. Disponível em: http://journal.universitaspahlawan.ac.id/index.php/Innovative/article/view/2084. Acesso em: 22 nov. 2024.