@book { MethodendesSelbstundZeitmanagements,
    title = "Methoden des Selbst- und Zeitmanagements",
    author = "Felix {Heuberger}",
    year = "2015",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/306569"
}