@book { IndustriekonomischeBetrachtungvonWerbung,
    title = "Industrieökonomische Betrachtung von Werbung",
    author = "Sabrina {Mandl}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/297436"
}