@book { JugendmarketingimSparkassensektor,
    title = "Jugendmarketing im Sparkassensektor",
    subtitle = "Marketingansätze unter besonderer Berücksichtigung des Sparkassen-SchulService",
    author = "Janine {Iversen}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836636728",
    url = "https://m.diplom.de/document/227252"
}