- Author: Carol Turkington
- Language: English
- Year: 2002
- Author: Alexander E. Gates David Ritchie
- Language: English
- Year: 2007
- Author: John Tabak
- Language: English
- Year: 2004
- Author: John Daintith William Gould
- Language: English
- Year: 2006
- Author: Jack Koumi
- Language: English
- Year: 2006
- Author: Diagram Group
- Language: English
- Year: 2003
- Author: Matthew Bunson
- Language: English
- Year: 1994
