Não informado. (2004). Exceptional Child Education Abstracts. Council for Exceptional Children.
Chicago-referens (17:e uppl.)Não informado. Exceptional Child Education Abstracts. Reston, Va: Council for Exceptional Children, 2004.
MLA-referens (8:e uppl.)Não informado. Exceptional Child Education Abstracts. Council for Exceptional Children, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.