- Author: Melissa S. Van Vuuren
- Language: English
- Year: 2010
- Author: Colin Matthew
- Language: English
- Year: 2000
- Author: Christine Krueger
- Language: English
- Year: 2002
- Author: James A. Dorn
- Language: English
- Year: 2013
- Author: Peter J. Kitson
- Language: English
- Year: 2013
- Author: John Oakland
- Language: English
- Year: 2003
- Author: Kathleen Hardesty Doig, Dorothy Medlin
- Language: English
- Year: 2007
- Author: Katarzyna Więckowska, Edyta Lorek-Jezińska
- Language: English
- Year: 2012
- Author: Robert James, Jeffrey Richards
- Language: English
- Year: 2010
- Author: Linda M. Shires
- Language: English
- Year: 2012