Nolasco, Marita Nimiah P. “SPED Teachers’ Extent of Implementing Picture Exchange Communication System: It’s Effect on the Functional Communication Skills of Learners With Down Syndrome”. International Journal of Multidisciplinary: Applied Business and Education Research 3, no. 9 (September 13, 2022): 1812–1820. Accessed January 23, 2026. https://ijmaberjournal.org/index.php/ijmaber/article/view/620.