- Author: Michael J. Schell
- Language: English
- Year: 2016
- Author: Michael J. Schell
- Language: English
- Year: 2013
- Author: Michael J. Schell
- Language: English
- Year: 2005
- Author: Charlene M. Solomon, Michael S. Schell
- Language: Spanish
- Year: 2011
- Author: Charlene Solomon Michael S. Schell
- Language: English
- Year: 2009