Cita APA (7th ed.)

Collins, D. (2001). Carrier grade voice over IP. McGraw-Hill.

Cita Chicago (17th ed.)

Collins, Daniel. Carrier Grade Voice over IP. New York: McGraw-Hill, 2001.

Cita MLA (9th ed.)

Collins, Daniel. Carrier Grade Voice over IP. McGraw-Hill, 2001.

Atenció: Aquestes cites poden no estar 100% correctes.