@book { MultimediarevolutioniertdieKommunikationsmglichkeitendesMarketings,
    title = "Multimedia revolutioniert die Kommunikationsmöglichkeiten des Marketings",
    author = "Gunnar {Röntgen} and Olaf {Genrich}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832412838",
    url = "https://m.diplom.de/document/217195"
}