- Author: H. Edward English, Bruce Wilkinson, H.C. Eastman
- Language: English
- Year: 1972
- Author: Bruce Wilkinson, Darlene Marie Wilkinson, Andries Cilliers
- Language: English
- Year: 2010
- Author: Bruce Wilkinson, David Kopp
- Language: English
- Year: 2011
- Author: Bruce Wilkinson
- Language: English
- Year: 2010
- Author: Bruce Wilkinson
- Language: English
- Year: 2011
- Author: Bruce Wilkinson
- Language: English
- Year: 2012
- Author: Bruce Wilkinson, David Kopp
- Language: English
- Year: 2009
- Author: Bruce Wilkinson Brian Smith
- Language: English
- Year: 2009
- Author: Bruce Wilkinson Heather Hair
- Language: English
- Year: 2019
- Author: Jessica Wilkinson Bruce Wilkinson
- Language: English
- Year: 2010