@book { MarketingkommunikationinOnlineDiensten,
    title = "Marketingkommunikation in Online-Diensten",
    author = "Marc {Tscheuschner}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832435110",
    url = "https://m.diplom.de/document/219176"
}