- Author: Dick Foeken, Ton Dietz, Leo de Haan, Linda Johnson
- Language: English
- Year: 2014
- Author: Rufus Akinyele Ton Dietz
- Language: English
- Year: 2019
- Author: Ton Dietz et al.
- Language: English
- Year: 2011
- Author: M.A. Mohamed Ton Dietz Abdel Ghaffar Mohamed Ahmed
- Language: English
- Year: 2001