@book { DieFrauenderFamilieBelle,
    title = "Die Frauen der Familie Belle",
    subtitle = "Roman",
    author = "Paula {Wall} and Gabriela {Schönberger}",
    year = "2019",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/499032"
}