ELISA, Tuti; TAMBUNAN, Lois Oinike; PURBA, Yoel Octobe. Pengaruh Model Pembeajaran Problem Based Learning Terhadap Hasi Beajar Siswa pada Materi Sistem Persamaan Linear Dua Variabel Kelas VIII Mts Swasta Al-Barokah Simalungun. Innovative: Journal Of Social Science Research, [S. l.], v. 4, n. 1, p. 3510–3523, 2024. DOI: 10.31004/innovative.v4i1.8296. Disponível em: https://j-innovative.org/index.php/Innovative/article/view/8296. Acesso em: 10 may. 2026.