APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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