Ruth Selvaranee Arunasalam. (2009). The picture exchange communication (PECS) programme as a catalyst in the communicative skills of autistic children.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ruth Selvaranee Arunasalam. The Picture Exchange Communication (PECS) Programme as a Catalyst in the Communicative Skills of Autistic Children. 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ruth Selvaranee Arunasalam. The Picture Exchange Communication (PECS) Programme as a Catalyst in the Communicative Skills of Autistic Children. 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.