Não informado. (1980). Behavior research of severe developmental disabilities. North Holland Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Behavior Research of Severe Developmental Disabilities. Amsterdam: North Holland Publishing, 1980.
Lua MLA (8ú heag.)Não informado. Behavior Research of Severe Developmental Disabilities. North Holland Publishing, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.