Não informado. (1971). Language Speech and Hearing Services in Schools. American Speech-Language-Hearing Association.
Chicago-viite (17. p.)Não informado. Language Speech and Hearing Services in Schools. Washington: American Speech-Language-Hearing Association, 1971.
MLA-viite (8. p.)Não informado. Language Speech and Hearing Services in Schools. American Speech-Language-Hearing Association, 1971.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.