@book { WerbungundEthik,
    title = "Werbung und Ethik",
    author = "Kerstin {Gehmlich}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836601399",
    url = "https://m.diplom.de/document/228773"
}