Cita APA (7th ed.)

Roddy, D., & Coolen, J. (1992). Electronic communications (3rd ed.). PHI.

Cita Chicago (17th ed.)

Roddy, Dennis, i John Coolen. Electronic Communications. 3rd ed. New Delhi: PHI, 1992.

Cita MLA (9th ed.)

Roddy, Dennis, i John Coolen. Electronic Communications. 3rd ed. PHI, 1992.