- Author: Harold Koontz y Heinz Weihrich
- Language: Spanish
- Year: 2015
- Author: Harold Koontz, Gil Armando Sánchez Soto, Heinz Weihrich
- Language: Spanish
- Year: 2013
- Author: Harold Koontz, Jaime Gómez Mont, Heinz Weihrich, Javier Dávila Martínez
- Language: Spanish
- Year: 2013
- Author: Harold Koontz, María Jesús Herrera Díaz, Mark Csnnice, Heinz Weihrich
- Language: Spanish
- Year: 2012
- Author: Harold Koontz Heinz Weihrich
- Language: Spanish
- Year: 2006
- Author: Harold Koontz Heinz Weihrich Mark Cannice
- Language: Spanish
- Year: 2014
- Author: Heinz Weihrich.
- Language: English
- Author: Daniel J. McCarthy Sheila M. Puffer Heinz Weihrich (auth.) Professor Dr. Ralph Berndt (eds.)
- Language: German-English
- Year: 1996