APA (7th ed.) Citation

Wallingford,T. (2015). Switching to VOIP. SPD.

Chicago Style (17th ed.) Citation

Wallingford,T. Switching to VOIP. Mumbai: SPD, 2015.

MLA (9th ed.) Citation

Wallingford,T. Switching to VOIP. SPD, 2015.

Warning: These citations may not always be 100% accurate.