@book { BeurteilungderSprechkompetenzineinerFremdsprache,
    title = "Beurteilung der Sprechkompetenz in einer Fremdsprache",
    author = "Sandra {Hutterli}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0230-7",
    url = "https://www.peterlang.com/document/1052326"
}