Cita APA (7a ed.)

Black, U. (2001). Voice over IP (2nd ed.). Prentice Hall.

Cita Chicago Style (17a ed.)

Black, Uyless. Voice over IP. 2nd ed. New Jersey: Prentice Hall, 2001.

Cita MLA (8a ed.)

Black, Uyless. Voice over IP. 2nd ed. Prentice Hall, 2001.