Rustika, R., Herlina, H. and Purwanggi, A. (2026) “The Effectiveness of PECS in Improving Expressive Communication Skills among Second-Grade Students with Autism in Special Schools”, Ainara Journal (Jurnal Penelitian dan PKM Bidang Ilmu Pendidikan), 7(1), pp. 143–153. doi: 10.54371/ainj.v7i1.1341.