Sari, Virgian Ferda, and Ni Wayan Sukerti. 2020. “PECS (Picture Exchange Communication System) Terhadap Keterampilan Sosial Anak ADHD (Attention Deficit-Hyperactive Disorder)”. JPK (Jurnal Pendidikan Khusus) 16 (1):28-34. https://doi.org/10.21831/jpk.v16i1.30797.