@book { MordmitMilchundZucker,
    title = "Mord mit Milch und Zucker",
    author = "Daniela {Kappel}",
    year = "2021",
    publisher = "dp DIGITAL PUBLISHERS GmbH",
    address = "Stuttgart, Germany",
    url = "https://shop.digitalpublishers.de/document/923268"
}