@book { DasmoderneBudget,
    title = "Das moderne Budget",
    subtitle = "Eine vergleichende Analyse der zentralen Staatshaushalte Frankreichs und der BRD",
    author = "Wolfgang {Kitterer}",
    year = "1977",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1070001"
}