एपीए उद्धरण

(1976). Centenary of the telephone. Switzerland: ITU Telecommunication Journal.

शिकागो स्टाइल उद्धरण

Centenary of the Telephone. Switzerland: ITU Telecommunication Journal, 1976.

एमएलए उद्धरण

Centenary of the Telephone. Switzerland: ITU Telecommunication Journal, 1976.