@book { NiklasLuhmannsKonzeptvonMacht,
    title = "Niklas Luhmanns Konzept von Macht",
    author = "Rafael {Malaczynski}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640484423",
    url = "https://www.hausarbeiten.de/document/140320"
}