@book { ArgumentierendesSchreibenimDeutschunterricht,
    title = "Argumentierendes Schreiben im Deutschunterricht",
    subtitle = "Theorie und Praxis",
    author = "Iris {Winkler}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095440"
}