- Author: Philip Banse, Ulf Buermeyer
- Language: German
- Year: 2023
- Author: Erich Kofmel
- Language: English
- Year: 2016
- Author: Erich Kofmel
- Language: English
- Year: 2016
- Author: George Washington
- Language: English
- Year: 2008
- Author: H. G. Wells
- Language: English
- Year: 2016
- Author: Charles Nettlefold
- Language: English
- Year: 2017
- Author: Terrence L. Johnson
- Language: English
- Year: 2021
- Author: Nick Shepley
- Language: English
- Year: 2015
- Author: Kenneth C. Blanchard Jr.
- Language: English
- Year: 2015
- Author: BusinessNews Publishing
- Language: English
- Year: 2017