APA-viite (7. p.)
CASTLE, D. (1994). SIGNALING AND ASSISTIVE LISTENING DEVICES FOR HEARING-IMPAIRED PEOPLE. ALEXANDER GRAHAM BELL ASSOCIATION FOR THE DEAF.
Chicago-viite (17. p.)
CASTLE, D.L. SIGNALING AND ASSISTIVE LISTENING DEVICES FOR HEARING-IMPAIRED PEOPLE. WASHINGTON (USA): ALEXANDER GRAHAM BELL ASSOCIATION FOR THE DEAF, 1994.
MLA-viite (9. p.)
CASTLE, D.L. SIGNALING AND ASSISTIVE LISTENING DEVICES FOR HEARING-IMPAIRED PEOPLE. ALEXANDER GRAHAM BELL ASSOCIATION FOR THE DEAF, 1994.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.