WONDO, Maria Trisna Sero. Pengembangan perangkat pembelajaran matematika SMP kelas VIII semester genap dengan model problem-based learning. PYTHAGORAS Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 12, n. 1, p. 76–86, 2017. DOI: 10.21831/pg.v12i1.14056. Disponível em: https://journal.uny.ac.id/index.php/pythagoras/article/view/14056. Acesso em: 11 jul. 2025.