@book { ViralesMarketingundAmbientMediafrdieZielgruppe50plus,
    title = "Virales Marketing und Ambient Media für die Zielgruppe 50plus",
    author = "Nina {Bach}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842835573",
    url = "https://m.diplom.de/document/229275"
}