Cita APA (7a ed.)

Bellamy, J. C. (1991). Digital Telephony (2a. ed.). Wiley.

Cita Chicago Style (17a ed.)

Bellamy, John C. Digital Telephony. 2a. ed. New York: Wiley, 1991.

Cita MLA (8a ed.)

Bellamy, John C. Digital Telephony. 2a. ed. Wiley, 1991.