- Author: Niklas Luhmann
- Language: German
- Year: 2013
- Author: Niklas Luhmann, translated by Rhodes Barrett
- Language: English
- Year: 2012
- Author: Niklas Luhmann Veronika Tacke Ernst Lukas
- Language: German
- Year: 2020
- Author: Niklas Luhmann (auth.)
- Language: German
- Year: 2000
- Author: Niklas Luhmann (auth.)
- Language: German
- Year: 1996
- Author: Niklas Luhmann
- Language: English
- Year: 2014
- Author: Niklas Luhmann
- Language: Spanish
- Year: 1996
- Author: Niklas Luhmann
- Language: Spanish
- Year: 2015
- Author: Niklas Luhmann Ernst Lukas Veronica Tacke
- Language: German
- Year: 2020
- Author: Niklas Luhmann
- Language: German
- Year: 2000