Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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