Asterisk: The Definitive Guide (3rd edition)

• http://safari.oreilly.com/9780596517342
• http://creativecommons.org/licenses/by-nc-nd/3.0/
• http://creativecommons.org/licenses/by-nc-nd/3.0/us/
• http://www.asterisk.org
• http://shop.oreilly.com/product/0636920025894.do
• http://my.safaribooksonline.com/9781449332433
• http://svnbook.red-bean.com
• http://oreilly.com/catalog/9780596517342/errata/
• http://www.oreillynet.com/pub/au/2236
• http://www.oreillynet.com/pub/au/2177
• http://www.oreillynet.com/pub/au/4633