Cita APA (7a ed.)

Swale, R., & Collins, D. (2014). Carrier-grade VoIP (3rd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Swale, Richard, y Daniel Collins. Carrier-grade VoIP. 3rd ed. New York: McGraw-Hill, 2014.

Cita MLA (8a ed.)

Swale, Richard, y Daniel Collins. Carrier-grade VoIP. 3rd ed. McGraw-Hill, 2014.