@book { DerMarshallPlanunddasHandlungsmotivderUSA,
    title = "Der Marshall-Plan und das Handlungsmotiv der USA",
    author = "Verena {König}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640848690",
    url = "https://www.hausarbeiten.de/document/168001"
}