Não informado. (2001). Volta voices. Alexander Graham Bell Association for the Deaf and Hard of Hearing.
Chicago-Zitierstil (17. Ausg.)Não informado. Volta Voices. Washington: Alexander Graham Bell Association for the Deaf and Hard of Hearing, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Volta Voices. Alexander Graham Bell Association for the Deaf and Hard of Hearing, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.