APA (7th ed.) Citation

Bellamy, J. (1991). Digital telephony / John Bellamy (2nd ed.). John Wiley & Sons.

Chicago Style (17th ed.) Citation

Bellamy, John. Digital Telephony / John Bellamy. 2nd ed. New York ; Chichester: John Wiley & Sons, 1991.

MLA (9th ed.) Citation

Bellamy, John. Digital Telephony / John Bellamy. 2nd ed. John Wiley & Sons, 1991.

Warning: These citations may not always be 100% accurate.