@book { SystemederFinanzbuchfhrung,
    title = "Systeme der Finanzbuchführung",
    author = "Julia {Jander}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842806511",
    url = "https://m.diplom.de/document/228130"
}