@book { BrgerschaftlichesEngagement,
    title = "Bürgerschaftliches Engagement",
    author = "Uwe {Kanzleiter}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832466534",
    url = "https://m.diplom.de/document/222040"
}