APA استشهاد

Bellamy, J. C. (2003). Digital telephony (3rd ed.). John Wiley & Sons.

استشهاد بنمط شيكاغو

Bellamy, John C. Digital Telephony. 3rd ed. Singapore: John Wiley & Sons, 2003.

MLA استشهاد

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