@book { IdentittEuropa,
    title = "Identität Europa",
    subtitle = "Wie europäisch ist die Türkei?",
    author = "Anja {Kleine}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/227609"
}