- Author: D. Sunshine Hillygus, Todd G. Shields
- Language: English
- Year: 2014
- Author: Donald R. Kelley, Todd G. Shields
- Language: English
- Year: 2013
- Author: D. Sunshine Hillygus, Todd G. Shields
- Language: English
- Year: 2014
- Author: Angie Maxwell, Todd G. Shields
- Language: English
- Year: 2011
- Author: D. Sunshine Hillygus Todd G. Shields
- Language: English
- Year: 2008