- Williams Syndrome Association of Ireland, website:
- Williams Syndrome Foundation (UK) provides guidelines for teachers, website:
- Williams Syndrome Association (US), website:
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- Phelps, L. (1998) Health-related Disorders in Children and Adolescents: A Guidebook for Understanding and Educating, Washington, DC: American Psychological Associates.
- Rosner, S.R. and Semel, E.M. (2003) Understanding Williams Syndrome: Behavioural Patterns and Interventions, Mahwah, NJ: Lawrence Erlbaum Associates.