Cita APA (7th ed.)

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.