- Author: Debra Johnson, Paul Robinson
- Language: English
- Year: 2005
- Author: Debra Johnson Colin Turner (auth.)
- Language: English
- Year: 1997
- Author: Debra Johnson Colin Turner (auth.)
- Language: English
- Year: 2007
- Author: Debra Johnson
- Language: English
- Year: 1997
- Author: Debra Johnson Colin Turner
- Language: English
- Year: 2007
- Author: Debra Johnson
- Language: English
- Year: 2000
- Author: Debra Johnson Colin Turner
- Language: English
- Year: 2007
- Author: Debra Johnson
- Language: English
- Year: 2003