- Author: Arno de Klerk
- Language: English
- Year: 2011
- Author: Suzanne de Klerk Arnold van Emmerik Anne van Giezen (auth.)
- Language: Dutch
- Year: 2010
- Author: Arno de Klerk and David L. King (Eds.)
- Language: English
- Year: 2011
- Author: Etienne de Klerk (auth.)
- Language: English
- Year: 2004
- Author: Randy L. Mayes (auth.) R. Mayes D. Rixen D.T. Griffith D. De Klerk S. Chauhan S.N. Voormeeren M.S. Allen (eds.)
- Language: English
- Year: 2012
- Author: Dr Arno de Klerk
- Language: English
- Year: 2011
- Author: Arno de Klerk Edward Furimsky
- Language: English
- Year: 2010
- Author: E. de Klerk
- Language: English
- Year: 2002
