- Author: Niklas Luhmann Ernst Lukas Veronica Tacke
- Language: German
- Year: 2020
- Author: Niklas Luhmann
- Language: German
- Year: 2000
- Author: Thomas Luhmann
- Language: English
- Year: 2013
- Author: Niklas Luhmann Saulo Krieger (Portuguese Translator) Alexandre Agnolon (Latin Citations Translator)
- Language: Portuguese
- Year: 2016
- Author: Niklas Luhmann
- Language: English
- Year: 1982
- Author: Luhmann Niklas, Tyulenev Sergey, Luhmann Niklas
- Language: English
- Year: 2012
- Author: Luhmann Niklas, Tyulenev Sergey, Luhmann Niklas
- Language: English
- Year: 2012
- Author: Niklas Luhmann Ernst Lukas Veronika Tacke
- Language: German
- Year: 2019
- Author: Niklas Luhmann Ernst Lukas Veronika Tacke
- Language: German
- Year: 2019
- Author: Niklas Luhmann
- Language: Spanish
- Year: 2006