- Author: Bruce Hallberg, Carlos Roberto Cordero Pedraza
- Language: Spanish
- Year: 2010
- Author: Bruce Hallberg
- Language: English
- Year: 2013
- Author: Bruce Hallberg
- Language: English
- Year: 2013
- Author: Bruce Hallberg
- Language: English
- Year: 2013
- Author: Bruce Hallberg
- Language: English
- Year: 2013
- Author: Bruce Hallberg
- Language: English
- Year: 2009
- Author: Bruce Hallberg
- Language: English
- Year: 2009
- Author: Bruce Hallberg
- Language: English
- Year: 2001