1. Alqarni, F. (2015). Collaborative strategic reading toenhance learners’ reading comprehension in English as a foreign language. Academic Journal of Interdisciplinary Studies, 4(1), 161–166.
2. American Psychiatric Association (APA) (1994). Diagnostic and statistical manual of mental disorders (4th ed.) (DSM-IV), Washington DC: American Psychiatric Association.
3. Bakare, M. O., & Munir, K. M. (2011). Excess of non-verbal cases of autism spectrum disorders presenting to orthodox clinical practice in Africa – A trend possibly resulting from late diagnosis and intervention. South African Journal of Psychiatry, 17(4), 118–120.
4. Bondy, A., & Frost, L. A. (1994). The picture exchange communication system. Focus on Autism and Other Developmental Disabilities, 9(3), 1–19.
5. Collet-Klingenberg, L. (2008). PECS: Steps for implementation. The National Professional Development Center on Autism Spectrum Disorders. The Waisman Center, The University of Wisconsin.