
- Author: Ralph L. Piedmont, Andrew Village
- Language: English
- Year: 2009

- Author: Ralph L. Piedmont
- Language: English
- Year: 2008

- Author: Ralph L. Piedmont (auth.)
- Language: English
- Year: 1998

- Author: Ralph L. Piedmont
- Language: English
- Year: 2006

- Author: Ralph L. Piedmont David O. Moberg
- Language: English
- Year: 2005

- Author: Ralph L. Piedmont
- Language: English
- Year: 2007