@book { DieAuenpolitikvonBndnis90DieGrnen,
    title = "Die Außenpolitik von Bündnis 90/Die Grünen",
    author = "Otto {Böhm}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/217593"
}