Purnamasari, N., N. F. Arifin, and D. A. Nawir. “The Effect of Perceptual – Motor Training on Cognitive Abilities in Children With Mild Mental Retardation”. Indonesian Contemporary Nursing Journal (ICON Journal), vol. 6, no. 1, Aug. 2021, pp. 21-29, doi:10.20956/icon.v6i1.10052.