@book { DasGeheimnisvonMarshallManor,
    title = "Das Geheimnis von Marshall Manor",
    subtitle = "Roman",
    author = "Barbara {Michaels} and Regina {Rawlinson}",
    year = "2020",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/535556"
}