@book { WerbewirkungimIntermediavergleich,
    title = "Werbewirkung im Intermediavergleich",
    author = "Daniel {Sollner} and Sabrina {Holzheimer}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832494858",
    url = "https://m.diplom.de/document/224616"
}