- Author: Leon W. Couch, José Luis Cuevas Ruiz, Ricardo Javier Romero Elizondo
- Language: Spanish
- Year: 2008
- Author: Leon W. Couch II
- Language: Spanish
- Year: 2008
- Author: Leon W. Couch
- Language: English
- Year: 2012
- Author: Leon W. Couch
- Language: Italian
- Year: 2002
