Cita APA

Roddy, D., & Coolen, J. (1989). Electronic communications (3rd ed.). Prentice-Hall of India.

Chicago Edition Citation

Roddy, Dennis, i John Coolen. Electronic Communications. 3rd ed. New Delhi: Prentice-Hall of India, 1989.

Cita MLA

Roddy, Dennis, i John Coolen. Electronic Communications. 3rd ed. Prentice-Hall of India, 1989.