Roddy, D., & Coolen, J. (2000). Electronic communications (4th ed.). Prentice Hall of India.
Chicago-čujuhus (17. p.)Roddy, Dennis, juo John Coolen. Electronic Communications. 4th ed. New Delhi: Prentice Hall of India, 2000.
MLA-čujuhus (9. p.)Roddy, Dennis, juo John Coolen. Electronic Communications. 4th ed. Prentice Hall of India, 2000.
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