ISNAINI, R. Pengembangan Buku Konsep Matematika Dengan Model Pembelajaran Problem Based Learning (PBL) Pada Materi Perbandingan. Jurnal Penelitian Ilmu Pendidikan Indonesia, [S. l.], v. 4, n. 4, p. 2921–2930, 2025. DOI: 10.31004/jpion.v4i4.865. Disponível em: https://jpion.org/index.php/jpi/article/view/865. Acesso em: 12 may. 2026.