Gaya APA

Chorafas, D, N. (1984). Telephony - Today And Tomorrow . Englewood Cliffs, New Jersey: Prentice-Hall 1984.

Gaya MLA

Chorafas, Dimitris, N. "Telephony - Today And Tomorrow". Englewood Cliffs, New Jersey: Prentice-Hall 1984, 1984. .