- Author: Cornelius Hasselblatt
- Language: German
- Year: 1996
- Author: Cornelius Hasselblatt, Bob de Jonge, Muriel Norde
- Language: English
- Year: 2010
- Author: Cornelius Hasselblatt
- Language: German
- Year: 2006
- Author: Cornelius Hasselblatt Bob de Jonge Muriel Norde
- Language: English
- Year: 2010