- Author: Bert Bielefeld
- Language: English
- Year: 2018
- Author: Bert Bielefeld
- Language: English
- Author: Bert Bielefeld Mathias Wirths (auth.)
- Language: German
- Year: 2010
- Author: Bert Bielefeld (editor)
- Language: English
- Year: 2018
- Author: Bert Bielefeld (editor) Roman Skowranek
- Language: English
- Year: 2017
- Author: Peter Wotschke Bert Bielefeld (editor)
- Language: English
- Year: 2017
Basics Budgeting
pdf
- Author: Bert Bielefeld Roland Schneider
- Language: English
- Year: 2014
- Author: Bert Bielefeld (editor)
- Language: English
- Year: 2018
- Author: Bert Bielefeld (editor)
- Language: German
- Year: 2018
- Author: Bert Bielefeld
- Language: English
- Year: 2013