Citazione APA

Bellamy, J. C. (2003). Digital telephony (3rd ed.). John Wiley & Sons.

Stile di citazione Chicago

Bellamy, John C. Digital Telephony. 3rd ed. Singapore: John Wiley & Sons, 2003.

Citazione MLA

Bellamy, John C. Digital Telephony. 3rd ed. John Wiley & Sons, 2003.