@book { FremdspracheninderPerspektivelebenslangenLernens,
    title = "Fremdsprachen in der Perspektive lebenslangen Lernens",
    author = "Annette {Berndt}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03571-1",
    url = "https://www.peterlang.com/document/1045701"
}