@book { DasErstePolnischeLesebuchfrAnfngerBand2,
    title = "Das Erste Polnische Lesebuch für Anfänger Band 2",
    author = "Wiktor {Kopernikus}",
    year = "2024",
    publisher = "Audiolego",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1461093"
}