
- Author: Alexander Ro?nagel Silke Jandt Jurgen Muller Andreas Gutscher Jessica Heesen
- Language: German
- Year: 2006

- Author: Ernest Nagel James R. Newman
- Language: Italian
- Year: 1992

- Author: Ann Ferguson Mechthild Nagel
- Language: English
- Year: 2009

- Author: Ernest Nagel James R. Newman
- Language: Spanish
- Year: 2007

- Author: Robert F. Nagel
- Language: English
- Year: 1996

- Author: Christian Nagel Bill Evjen Jay Glynn Karli Watson Morgan Skinner
- Language: English
- Year: 2010