Cita APA (7a ed.)

Bellamy, J. C. (2000). Digital telephony (3rd ed.). John Wiley.

Cita Chicago Style (17a ed.)

Bellamy, John C. Digital Telephony. 3rd ed. New York [etc.]: John Wiley, 2000.

Cita MLA (9a ed.)

Bellamy, John C. Digital Telephony. 3rd ed. John Wiley, 2000.