APA (7th ed.) Citation

Wallingford, T. (2006). VoIP Hacks: [tips & tools for internet telephony]. O'Reilly.

Chicago Style (17th ed.) Citation

Wallingford, Ted. VoIP Hacks: [tips & Tools for Internet Telephony]. Beijing <<[u.a.]>>: O'Reilly, 2006.

MLA (9th ed.) Citation

Wallingford, Ted. VoIP Hacks: [tips & Tools for Internet Telephony]. O'Reilly, 2006.

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