Y. Suryadi, H. Hidayat, A. Sutopo, A. Gandamana, A. P. Sirait, and A. Gafur, “Analysis of Daily Living Skills Technique of James W Parington and Michael Muller by Teacher of Special Needs School in Deliserdang North Sumatera”, ijmdsa, vol. 5, no. 3, pp. 536–542, Jun. 2026.