1. The American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders (4th ed., text rev.). Washington, DC: Author, 2000.
2. Advances in autism;Geschwind;Annu Rev Med,2009
3. Autism and Developmental Disabilities Monitoring (ADDM) Network. Community report: prevalence of autism spectrum disorders (ASDs) among multiple areas of the United States in 2008. http://www.cdc.gov/ncbddd/autism/documents/ADDM-2012-Community-Report.pdf. Accessed May 26, 2012.
4. Autism Speaks. Autism prevalence rises to 1 in 88. http://www.autismspeaks.org/science/science-news/autism-prevalence-rises-1-88. Accessed May 26, 2012.
5. Autism Speaks. New research finds annual cost of autism has more than tripled to $126 billion in the U.S. and reached £34 billion in the UK. http://www.autismspeaks.org/about-us/press-releases/annual-cost-of-autism-triples. Accessed May 26, 2012.