NURLITA, Maya. Pengembangan Soal Terbuka (Open-Ended Problem) pada Mata Pelajaran Matematika SMP Kelas VIII. PYTHAGORAS Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 10, n. 1, p. 38–49, 2015. DOI: 10.21831/pg.v10i1.9106. Disponível em: https://journal.uny.ac.id/index.php/pythagoras/article/view/9106. Acesso em: 10 jul. 2025.