@book { MotivationimUnterricht,
    title = "Motivation im Unterricht",
    author = "Franziska {Zschornak}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640537549",
    url = "https://www.hausarbeiten.de/document/145527"
}