APA (7th ed.) Citation

Meggelen, J. V., Smith, J., & Madsen, L. (2005). Asterisk: The future of telephony. OReilly.

Chicago Style (17th ed.) Citation

Meggelen, Jim Van, Jared Smith, and Leif Madsen. Asterisk: The Future of Telephony. Beijing: OReilly, 2005.

MLA (9th ed.) Citation

Meggelen, Jim Van, et al. Asterisk: The Future of Telephony. OReilly, 2005.