Não informado. (1951). Exceptional Children. Council for Exceptional Children.
Lua i Stíl Chicago (17ú heag.)Não informado. Exceptional Children. Washington: Council for Exceptional Children, 1951.
Lua MLA (8ú heag.)Não informado. Exceptional Children. Council for Exceptional Children, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.