Sunusi, H. C., Soetjiningsih, C. H. and Kristijanto, A. I. (2019) “Communication Ability and Verbal Communication Apprehension of Senior High School Adolescents With Intellectual Disability: Research Based on Picture Exchange Communication System (PECS) and Measure of Elementary Communication Apprehension (MECA)”, ANIMA Indonesian Psychological Journal, 34(3), pp. 163-174. doi: 10.24123/aipj.v34i3.2302.