Roddy, D., & By , C. (1995). Electronic communications (4th ed.). Prentice Hall.
Cita Chicago Style (17a ed.)Roddy, Dennis, y Coolen By. Electronic Communications. 4th ed. New Delhi: Prentice Hall, 1995.
Cita MLA (9a ed.)Roddy, Dennis, y Coolen By. Electronic Communications. 4th ed. Prentice Hall, 1995.
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