- Author: Charles B. Perkins
- Language: English
- Year: 2008
- Author: Wade Stephen
- Language: English
- Year: 2009
- Author: Meyer Anna
- Language: English
- Year: 2005
- Author: Medwed Daniel S
- Language: English
- Year: 2017
- Author: Lazer David
- Language: English
- Year: 2004
- Author: Berry Andrew, Watson James D
- Language: English
- Year: 1975
- Author: Design Network Switzerland, Berry Andrew James, Davies Kevin, Watson James D
- Language: English
- Year: 2017
- Author: Sozer Amanda C
- Language: English
- Year: 2014
- Author: Benecke Mark
- Language: German
- Year: 2001