
- Author: Richard Wagner
- Language: English
- Year: 2006

- Author: Richard Wagner Richard Mansfield
- Language: English
- Year: 2007

- Author: Richard Wagner
- Language: English
- Year: 2008

- Author: Sue Jenkins Richard Wagner
- Language: English
- Year: 2008

- Author: Richard Wagner
- Language: English
- Year: 2011

- Author: Sue Jenkins Richard Wagner
- Language: English
- Year: 2008

- Author: Margaret Levine Young David C. Kay Richard Wagner
- Language: English
- Year: 2004

- Author: Richard Wagner
- Language: English
- Year: 2009

- Author: Sue Jenkins Richard Wagner
- Language: English
- Year: 2008

- Author: Richard Wagner
- Language: English
- Year: 2009