Wallingford,Ted. (2015). Switching to VOIP. SPD.
Cita Chicago (17th ed.)Wallingford,Ted. Switching to VOIP. Mumbai: SPD, 2015.
Cita MLA (9th ed.)Wallingford,Ted. Switching to VOIP. SPD, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)