Sari, V. F., & Sukerti, N. W. (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