@book { DeutschalsFremdspracheinAserbaidschan,
    title = "Deutsch als Fremdsprache in Aserbaidschan",
    author = "Gunel {Babayeva}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18573",
    url = "https://www.peterlang.com/document/1151140"
}