1. Akshoomoff, N. A., & Stahmer, A. (2006). Early intervention programs and policies for children with autistic spectrum disorders. In H. E. Fitzgerald, B. M. Lester, & B. Zuckerman (Eds.), The crisis in youth mental health: Critical issues and effective programs, Vol. 1. childhood disorders (pp. 109–131). Westport, CT: Praeger.
2. All-Party Parliamentary Group on Autism. (2007). Policy into practice: Implementation of the national service framework for children, young people, and maternity services by local authorities. London, UK: The National Autistic Society.
3. American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders, 4th edition, text revision. Washington, DC: American Psychiatric Publishing, Inc.
4. Baron, R. M., & Kenny, D. A. (1986). The moderator-mediator variable distinction in social psychological research: Conceptual, strategic, and statistical considerations. Journal of Personality and Social Psychology, 51(6), 1173–1182.
5. Barros, A. J. D., & Hirakata, V. N. (2003). Alternatives for logistic regression in cross-sectional studies: An empirical comparison of models that directly estimate the prevalence ratio. BMC Medical Research Methodology, 3(21), 1–13.