Held, G. (2000). Understanding data communications from fundamentals to networking (3rd ed.). John Wiley & Sons.
Παραπομπή Chicago StyleHeld, Gilbert. Understanding Data Communications from Fundamentals to Networking. 3rd ed. Chichester: John Wiley & Sons, 2000.
Παραπομπή MLAHeld, Gilbert. Understanding Data Communications from Fundamentals to Networking. 3rd ed. John Wiley & Sons, 2000.
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