@book { LernmotivationauspdagogischerSicht,
    title = "Lernmotivation aus pädagogischer Sicht",
    author = "Christine  {Thiel}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640269310",
    url = "https://www.hausarbeiten.de/document/122227"
}