Cita APA (7th ed.)

Bellamy, J. C. (2003). Digital Telephony (3rd ed.). Wiley India.

Cita Chicago (17th ed.)

Bellamy, John C. Digital Telephony. 3rd ed. New Dehli: Wiley India, 2003.

Cita MLA (9th ed.)

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