APA (7th ed.) Citation

Held, G. (2002). Understanding data communications (7. ed., 1. print.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Held, Gilbert. Understanding Data Communications. 7. ed., 1. print. Boston [u.a.]: Addison-Wesley, 2002.

MLA (9th ed.) Citation

Held, Gilbert. Understanding Data Communications. 7. ed., 1. print. Addison-Wesley, 2002.