@book { DieMarketingkonzeptiondesAnzeigenblattes,
    title = "Die Marketingkonzeption des Anzeigenblattes",
    author = "Rene {Kaftanski}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832435134",
    url = "https://m.diplom.de/document/219178"
}