Zahara Islamyati, Alda, and Ardisal. 2020. “Efektivitas Permainan Ular Tangga Dalam Meningkatkan Kemampuan Konsep Ruang Bagi Anak Autisme”. Ranah Research : Journal of Multidisciplinary Research and Development 2 (4), 53-57. https://jurnal.ranahresearch.com/index.php/R2J/article/view/303.