Cita APA (7a ed.)
Held, G. (2002). Understanding data communications (7th ed.). Addison-Wesley.
Cita Chicago Style (17a ed.)
Held, Gilbert. Understanding Data Communications. 7th ed. New Delhi : Dorling Kindersley : Boston: Addison-Wesley, 2002.
Cita MLA (9a ed.)
Held, Gilbert. Understanding Data Communications. 7th ed. Addison-Wesley, 2002.
Precaución: Estas citas no son 100% exactas.