@book { Wertewirken,
    title = "Werte wirken",
    author = "Martin {Permantier} and Daniel {Bischoff} and Britta {Korpas}",
    year = "2021",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221386"
}