Cita APA (7th ed.)

Bellamy, J. (1982). Digital telephony. Wiley-Interscience.

Cita Chicago (17th ed.)

Bellamy, John. Digital Telephony. New York: Wiley-Interscience, 1982.

Cita MLA (9th ed.)

Bellamy, John. Digital Telephony. Wiley-Interscience, 1982.