Cita APA (7th ed.)
Dang, L., & Jennings, C. (2002). Practical voip using vocal. Shroff Pub : Oreilly.
Cita Chicago (17th ed.)
Dang, Luan, i Cullen/Kelly Jennings. Practical Voip Using Vocal. Kolkata: Shroff Pub : Oreilly, 2002.
Cita MLA (9th ed.)
Dang, Luan, i Cullen/Kelly Jennings. Practical Voip Using Vocal. Shroff Pub : Oreilly, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.