Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Bellamy, John. Digital Telephony. 3rd ed. New York ; New Delhi: Wiley India, 2000.

Cita MLA (8th ed.)

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