SUNUSI, H. C.; SOETJININGSIH, C. H.; KRISTIJANTO, A. I. 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, v. 34, n. 3, p. 163-174, 25 Apr. 2019.