@book { Sprachenpolitikinsterreich,
    title = "Sprachenpolitik in Österreich",
    subtitle = "Eine Bestandsaufnahme",
    author = "Brigitta {Busch} and Rudolf {de Cillia}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095305"
}