@book { EinstellungenzuMuttersprachenundFremdsprachen,
    title = "Einstellungen zu Muttersprachen und Fremdsprachen",
    author = "Enisa {Pliska}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05052-3",
    url = "https://www.peterlang.com/document/1048918"
}