Não informado. (1971). Language Speech and Hearing Services in Schools. American Speech-Language-Hearing Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Language Speech and Hearing Services in Schools. Washington: American Speech-Language-Hearing Association, 1971.
Lua MLA (8ú heag.)Não informado. Language Speech and Hearing Services in Schools. American Speech-Language-Hearing Association, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.