- Author: Howitt Dennis, Cramer Duncan(Contributor)
- Language: English
- Year: 2016
- Author: Cramer Duncan, Howitt Dennis
- Language: English
- Year: 2011
- Author: Cramer Duncan, Howitt Dennis
- Language: English
- Year: 2011
- Author: Cramer Duncan, Howitt Dennis
- Language: English
- Year: 2014
- Author: Cramer Duncan, Howitt Dennis
- Language: English
- Year: 2017