
- Author: Jürgen Deeg, Wendelin Küpers, Jürgen Weibler
- Language: German
- Year: 2010

- Author: Helmut Hofstetter
- Language: German
- Year: 2011

- Author: Jana Eberlein
- Language: German
- Year: 2010

Marketing
pdf
- Author: Reinhard Hünerberg
- Language: German
- Year: 1984

- Author: Edgar Dacqué (editor), Joachim Schröder (editor), Manfred Schröter (editor), Horst Kliemann (editor)
- Language: German
- Year: 1948

- Author: Heinrich Frieling
- Language: German
- Year: 1937

- Author: Eugen Mahr
- Language: German
- Year: 1951