- Author: Sher Barbara
- Language: English
- Year: 2010
- Author: Sher Barbara
- Language: English
- Year: 2007
- Author: Sher Barbara, Smith Barbara
- Language: German
- Year: 2016
- Author: Bettina Lemke, Sher Barbara
- Language: German
- Year: 2016
- Author: Sher Barbara Butler Ralph & Butler Ralph
- Language: English
- Year: 2006
- Author: Barbara Sher Barbara Smith
- Language: English
- Year: 1995