ISTIGHFARAH, Y.; NGAYUNINGTYAS, P. PENINGKATAN KEMAMPUAN BERHITUNG SISWA TUNAGRAHITA SEDANG KELAS VIII MELALUI MEDIA ULAR TANGGA DI SMP INKLUSI TPA JEMBER. SPEED Journal : Journal of Special Education, [S. l.], v. 1, n. 1, p. 23–27, 2018. Disponível em: https://jurnal.unipar.ac.id/index.php/speed/article/view/17. Acesso em: 15 mar. 2025.