Cita APA (7th ed.)
Douskalis, B. Putting VoIP to Work: Softswitch Network Design and Testing. Prentice-Hall.
Cita Chicago (17th ed.)
Douskalis, Bill. Putting VoIP to Work: Softswitch Network Design and Testing. Nueva York, EUA: Prentice-Hall.
Cita MLA (9th ed.)
Douskalis, Bill. Putting VoIP to Work: Softswitch Network Design and Testing. Prentice-Hall.
Atenció: Aquestes cites poden no estar 100% correctes.