SIMANJUNTA, Ruth M.; LUMBAN BATU, Siti Sadar Sulastri; HUTAURUK, Agusmanto; GULTOM, Sanggam. Efektivitas Model Pembelajaran Problem Based Learning terhadap Peningkatan Kemampuan Pemahaman Matematis dan Kreativitas Siswa Pada Materi Segi Empat Kelas VII. Innovative: Journal Of Social Science Research, [S. l.], v. 3, n. 5, p. 7061–7074, 2023. Disponível em: http://j-innovative.org/index.php/Innovative/article/view/5685. Acesso em: 28 apr. 2026.