@book { EnglishintheEuropeanUnion,
    title = "English in the European Union",
    author = "Stefan {Hinterholzer}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638618120",
    url = "https://www.hausarbeiten.de/document/70524"
}