APA (7th ed.) Citation

(2009). Asterisk 1.4: The professional's guide : implementing, administering, and consulting on commercial IP telephony solutions. Packt Pub.

Chicago Style (17th ed.) Citation

Asterisk 1.4: The Professional's Guide : Implementing, Administering, and Consulting on Commercial IP Telephony Solutions. Birmingham, U.K: Packt Pub, 2009.

MLA (9th ed.) Citation

Asterisk 1.4: The Professional's Guide : Implementing, Administering, and Consulting on Commercial IP Telephony Solutions. Packt Pub, 2009.