- Author: Andrew Whitaker Daniel Newman
- Language: English
- Year: 2006
- Author: Gary Halleen Greg Kellogg
- Language: English
- Year: 2007
- Author: Inc. Cisco Systems
- Language: English
- Year: 2002
- Author: Cisco Systems Inc.
- Language: English
- Year: 2004
- Author: Steve Kalman
- Language: English
- Year: 2003
- Author: Sam Halabi
- Language: English
- Year: 2003
- Author: Jim Durkin John Goodman Frank Posse Michael Rezek Mike Wallace Ron Harris
- Language: English
- Year: 2010
- Author: Jonathan Davidson
- Language: English
- Year: 2010