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, Malang, Indonesia, v. 3, n. 9, p. 1812–1820, 2022. DOI: 10.11594/ijmaber.03.09.21. Disponível em: https://www.ijmaberjournal.org/index.php/ijmaber/article/view/620. Acesso em: 9 feb. 2026.