@book { GuterUnterrichtAnalyseverschiedenerDefinitionen,
    title = "Guter Unterricht - Analyse verschiedener Definitionen",
    author = "Anica {König}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640830138",
    url = "https://www.hausarbeiten.de/document/166684"
}