@book { SchwarzeNarzissenoderSchonungslos,
    title = "Schwarze Narzissen - oder: Schonungslos",
    author = "Katherine {John} and Bettina {Zeller}",
    year = "2022",
    publisher = "dotbooks Verlag",
    address = "München, Germany",
    url = "https://m.dotbooks.de/document/1039453"
}