
- Author: Robert A. Rosenstone, Sergio Alegre, Ángel Luis Hueso
- Language: Spanish
- Year: 1997

- Author: Robert A. Rosenstone
- Language: English
- Year: 1998

- Author: Alun Munslow Robert A. Rosenstone
- Language: English
- Year: 2004

- Author: Robert A. Rosenstone
- Language: English
- Year: 2005