@book { PromoPrintMagazin42019,
    title = "Promo Print Magazin 4 / 2019",
    author = "Marc {Debus}",
    year = "2020",
    publisher = "Schreibstark-Verlag",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1014823"
}