@book { LegendofSagenfeldinGermanyDieLegendevonSagenfeldinDeutschlandmitAudio,
    title = "Legend of Sagenfeld, in Germany / Die Legende von Sagenfeld, in Deutschland (mit Audio)",
    author = "Mark {Twain} and Ulrike {Wittmann} and Ilya {Frank} and EasyOriginal {Verlag}",
    year = "2021",
    publisher = "EasyOriginal Verlag",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1303691"
}