
- 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