Não informado. (1980). Behavior research of severe developmental disabilities. North Holland Publishing.
Chicago-referens (17:e uppl.)Não informado. Behavior Research of Severe Developmental Disabilities. Amsterdam: North Holland Publishing, 1980.
MLA-referens (8:e uppl.)Não informado. Behavior Research of Severe Developmental Disabilities. North Holland Publishing, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.