Cita APA (7th ed.)

Bellamy, J. C. (2000). Digital telephony (3a. ed.). John Wiley and Sons.

Cita Chicago (17th ed.)

Bellamy, John C. Digital Telephony. 3a. ed. Nueva York: John Wiley and Sons, 2000.

Cita MLA (9th ed.)

Bellamy, John C. Digital Telephony. 3a. ed. John Wiley and Sons, 2000.