APA (7th ed.) Citation

Bellamy, J. (1982). Digital telephony (2. print.). Wiley.

Chicago Style (17th ed.) Citation

Bellamy, John. Digital Telephony. 2. print. New York [u.a.]: Wiley, 1982.

MLA (9th ed.) Citation

Bellamy, John. Digital Telephony. 2. print. Wiley, 1982.