@book { DieRegulierungderRechnungslegunginderEU,
    title = "Die Regulierung der Rechnungslegung in der EU",
    author = "Maximilian {Thomas}",
    year = "2020",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/914805"
}