- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2002
- Author: Cay Horstmann Gary Cornell
- Language: French
- Year: 2008
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2001
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2001
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2000
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2001
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2000
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2005
- Author: Cay Horstmann Gary Cornell
- Language: English
- Year: 2000