Lua APA (7ú heag.)

Held, G. (2002). Understanding data communications (7th ed.). Addison-Wesley, ; Pearson Education.

Lua i Stíl Chicago (17ú heag.)

Held, Gilbert. Understanding Data Communications. 7th ed. Boston : New Delhi: Addison-Wesley, ; Pearson Education, 2002.

Lua MLA (8ú heag.)

Held, Gilbert. Understanding Data Communications. 7th ed. Addison-Wesley, ; Pearson Education, 2002.

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