@book { DieZukunftderWerbungimInternet,
    title = "Die Zukunft der Werbung im Internet",
    subtitle = "Eine explorative Studie über zukünftige Marktkommunikation in Online-Medien",
    author = "Volker {Walter}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832405830",
    url = "https://m.diplom.de/document/216517"
}