D. Dahliawaty, Z. Zulmiyetri, I. Irdamurni, and I. Utami, “Improving Learning of Addition Count Operation through Realistic Mathematics Education Approach for Mildly Retarded Children: Classroom Action Research VII SLB Autisma Mutiara Bangsa Pratama Padang”, edumaspul, vol. 7, no. 1, pp. 716-721, Mar. 2023.