1. American Speech-Language-Hearing Association. Adult Speech and Language. Retrieved January 7, 2010 from http://www.asha.org/public/speech/disorders/AdultSandL.htm.
2. American Speech-Language-Hearing Association. Child Speech and Language. Retrieved January 7, 2010 from http://www.asha.org/public/speech/disorders/ChildSandL.htm.
3. Advanced Technology in Speech Disorder Therapy of Romanian Language;Danubianu;Journal of Computing,2009
4. Owens RE, Metz DE, Haas A. Introduction to communication disorders: A life span approach (2nd Ed.). Boston: Mass: Allyn & Bacon; 2003.
5. National Joint Committee on Learning Disabilities. Learning Disabilities and Young Children: Identification and Intervention. Retrieved July 10, 2011 from http://www.ldonline.org/article/Learning_Disabilities_and_Young_Children%3A_Identification_.