- Author: Christian Lengeler, Jacqueline Cattani, Don de Savigny
- Language: English
- Year: 1996
- Author: Don de Savigny Harun Kasale Conrad Mbuya Graham Reid
- Language: English
- Year: 2008
- Author: Don De Savigny Harun Kasale Conrad Mbuya Graham Reid
- Language: French
- Year: 2008
- Author: D. De Savigny P. Wijeyaratne Don De Savigny Pandu Wijeyaratne
- Language: English
- Year: 1995