- Author: Gerold Bezzenberger, Tilman Bezzenberger, Karsten Schmidt
- Language: German
- Year: 2013
- Author: Nanna Fuhrhop (editor), Renata Szczepaniak (editor), Karsten Schmidt (editor)
- Language: German
- Year: 2017
- Author: Karsten Schmidt Haimo Stiemer
- Language: German
- Year: 2022
- Author: Karsten Schmidt Haimo Stiemer
- Language: German
- Year: 2022
- Author: Karsten Schmidt Götz Trenkler (auth.)
- Language: German
- Year: 2015
- Author: Karsten Schmidt (auth.)
- Language: German
- Year: 2008
- Author: Prof. Dr. Karsten Schmidt Prof. Dr. Götz Trenkler (auth.)
- Language: German
- Year: 1998
Mystery Shopping : Leistungsfähigkeit eines Instruments zur Messung der Dienstleistungsqualität
pdf
- Author: Karsten Schmidt
- Language: German
- Year: 2007
- Author: Karsten Schmidt Dr., Götz Trenkler
- Language: German
- Year: 2006