WitaHarahap, Lola, and Edy Surya. “Development of Learning Media in Mathematics for Students With Special Needs”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 33, no. 3 (May 22, 2017): 1–12. Accessed July 3, 2024. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7318.