@book { DidaktischeModellenachWolfgangKlafki,
    title = "Didaktische Modelle nach Wolfgang Klafki",
    author = " {Anonym}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640848898",
    url = "https://www.hausarbeiten.de/document/168033"
}