APA (7th ed.) Citation

Bellamy, J. (1991). Digital Telephony. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Bellamy, John. Digital Telephony. John Wiley & Sons, 1991.

MLA (8th ed.) Citation

Bellamy, John. Digital Telephony. John Wiley & Sons, 1991.

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