- Author: Dallas Ross, Jackson Sophie, Swallow Peter, Watt David
- Language: English
- Year: 2016
- Author: Watt David C
- Language: English
- Author: Findlay William, Watt David Anthony
- Language: English
- Year: 2004
- Author: Findlay William, Hughes John, Watt David A
- Language: English
- Year: 1990