Rustika, Rustika, Heni Herlina, and Annisa Purwanggi. “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, no. 1 (March 30, 2026): 143–153. Accessed April 1, 2026. https://journal.ainarapress.org/index.php/ainj/article/view/1341.