Vir - besedilo: Službe za poklicno usmerjanje invalidnih oseb
Sobesedilo: Vsaka mednarodna primerjava definicij invalidnosti v različnih jurisdikcijah in kulturah mora upoštevati način, kako so te definicije implicitno in eksplicitno uporabljanje na ravni sistemov za oceno skladnosti.
Vir - besedilo: Employment Guidance Services for People with Disabilities, http://www.eurofound.europa.eu/publications/htmlfiles/ef0633.htm
Sobesedilo: Any international comparison of definitions of disability across jurisdictions and cultures needs to take account of the way in which such definitions are implicitly or explicitly operationalised in terms of assessment systems.