Shelly, G. B. (2001). Business data communications: Introductory concepts and techniques (3rd ed.). Course Technology.
Lua i Stíl Chicago (17ú heag.)Shelly, Gary B. Business Data Communications: Introductory Concepts and Techniques. 3rd ed. Boston, MA: Course Technology, 2001.
Lua MLA (8ú heag.)Shelly, Gary B. Business Data Communications: Introductory Concepts and Techniques. 3rd ed. Course Technology, 2001.
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