1. Allen, C. W., Silove, N., Williams, K., & Hutchins, P. (2007). Validity of the Social Communication Questionnaire in assessing risk of autism in preschool children with developmental problems. Journal of Autism and Developmental Disorders, 37, 1272–1278.
2. American Psychiatric Association. (2006). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: American Psychiatric Association.
3. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Arlington, VA: American Psychiatric Publishing.
4. Centers for Disease Control and Prevention, Autism and Developmental Disabilities Monitoring Network Surveillance Year 2002 Principal Investigators. (2007). Prevalence of autism spectrum disorders—Autism and Developmental Disabilities Monitoring Network, 14 sites, United States, 2002. Morbidity and Mortality Weekly Report, 56(No. SS-1), 12–28.
5. Centers for Disease Control and Prevention, Autism and Developmental Disabilities Monitoring Network Surveillance Year 2008 Principal Investigators. (2012). Prevalence of autism spectrum disorders—Autism and Developmental Disabilities Monitoring Network, 14 sites, United States, 2008. Morbidity and Mortality Weekly Report, 61, 1–19.