@book { WalterLippmannundDeutschland,
    title = "Walter Lippmann und Deutschland",
    subtitle = "Realpolitische Betrachtungen im 20. Jahrhundert",
    author = "Susanne {Schlaack}",
    year = "2004",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098044"
}