@book { WilhelmvonHumboldtundseineTheoriederBildung,
    title = "Wilhelm von Humboldt und seine Theorie der Bildung",
    author = "Sandy {Stanke}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638528139",
    url = "https://www.hausarbeiten.de/document/58681"
}