Não informado. (2001). Volta voices. Alexander Graham Bell Association for the Deaf and Hard of Hearing.
Chicago-viite (17. p.)Não informado. Volta Voices. Washington: Alexander Graham Bell Association for the Deaf and Hard of Hearing, 2001.
MLA-viite (8. p.)Não informado. Volta Voices. Alexander Graham Bell Association for the Deaf and Hard of Hearing, 2001.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.