- Author: Niklas Luhmann
- Language: Spanish
- Year: 1998
- Author: C. T. Russell J. G. Luhmann R. J. Strangeway
- Language: English
- Year: 2016
Teorija sistema
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- Author: Niklas Luman (Niklas Luhmann)
- Language: Serbian
- Year: 1981
- Author: Niklas Luman (Niklas Luhmann)
- Language: Serbian
- Year: 1992
- Author: Niklas Luman (Niklas Luhmann)
- Language: Serbian
- Year: 2001
- Author: Niklas Luhmann
- Language: Italian
- Year: 1983
- Author: Niklas Luhmann (auth.) André Kieserling (ed.)
- Language: German
- Year: 2008
- Author: Niklas Luhmann
- Language: Portuguese
- Year: 2016
- Author: Niklas Luhmann Javier Torres Nafarrate
- Language: Spanish
- Year: 2004