- Author: J. P. K. Kritizinger, J. P. Bosman, J. H. Meiring, C. J. Schumann
- Language: English
- Year: 2018
- Author: Verna van Schaik
- Language: English
- Year: 2010
- Author: Melanie Cloete Ferina Marimuthu
- Language: English
- Year: 2019
- Author: T. H. le Roux P. de Villiers Pienaar
- Language: Afrikaans
- Year: 1971
- Author: J. J. le Roux C. J. Nienaber
- Language: Afrikaans
- Year: 1951
- Author: Edm. Botes J. A. K. de Lange
- Language: Afrikaans
- Year: 1930
- Author: P. de V. Pienaar
- Language: Afrikaans
- Year: 1947
- Author: M. S. B. Kritzinger A. M. M. de Villiers E. J. Pienaar
- Language: Afrikaans
- Year: 1927