@book { QualittssicherungfrdieDaFVermittlung,
    title = "Qualitätssicherung für die DaF-Vermittlung",
    author = "Irita {Birzniece}",
    year = "2021",
    publisher = "Meidenbauer",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1102223"
}