@book { DasVerhltnisvonNaturundFreiheitinSchillersWilhelmTell,
    title = "Das Verhältnis von Natur und Freiheit in Schillers Wilhelm Tell",
    author = "Michael {Kepling}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656513575",
    url = "https://www.hausarbeiten.de/document/262456"
}