- Administration on Intellectual and Developmental Disabilities (AIDD)www.acl.gov
- American Association on Intellectual and Developmental Disabilities (formerly AAMR)www.aaidd.org
- DisabilityMeasures.orgwww.disabilitymeasures.org
- International Classification of Functioning, Disability, and Healthwww.cdc.gov
- National Council on Disability www.ncd.gov
