@book { MitdemerstenEindruckbegeistern,
    title = "Mit dem ersten Eindruck begeistern",
    author = "Jutta D. {Blume}",
    year = "2014",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403287"
}