APA (7th ed.) Citation

Held, G. (2000). Understanding data communications: From fundamentals to networking (3rd ed.). Wiley.

Chicago Style (17th ed.) Citation

Held, Gilbert. Understanding Data Communications: From Fundamentals to Networking. 3rd ed. Chichester, Eng: Wiley, 2000.

MLA (9th ed.) Citation

Held, Gilbert. Understanding Data Communications: From Fundamentals to Networking. 3rd ed. Wiley, 2000.