- Author: Larry D. Schroeder, David L. Sjoquist, Paula E. Stephan
- Language: English
- Year: 2016
- Author: Larry D. Schroeder David L. Sjoquist Paula E. Stephan
- Language: English
- Year: 1986
- Author: Paula E. Stephan Ronald G. Ehrenberg
- Language: English
- Year: 2007
- Author: Paula E. Stephan Ronald G. Ehrenberg
- Language: English
- Year: 2007
- Author: Larry Schroeder Dr. David L. Sjoquist Dr. Paula E. Stephan
- Language: English
- Year: 1986