@book { Mein9EuroSommermrchen,
    title = "Mein 9-Euro-Sommermärchen",
    author = "Diana {Seiler}",
    year = "2023",
    publisher = "LANA-Film e.K.",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1415932"
}