APA (7th ed.) Citation

Meggelen, J. v., Smith, J., & Madsen, L. (2007). Asterisk: The future of telephony (2nd ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Meggelen, Jim van, Jared Smith, and Leif Madsen. Asterisk: The Future of Telephony. 2nd ed. Sebastopol, California: O'Reilly, 2007.

MLA (9th ed.) Citation

Meggelen, Jim van, et al. Asterisk: The Future of Telephony. 2nd ed. O'Reilly, 2007.