@book { DieGeisterderWeihnachtgeheninRente,
    title = "Die Geister der Weihnacht gehen in Rente",
    author = "Haike {Hausdorf}",
    year = "2020",
    publisher = "Ashera Verlag",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/997373"
}