@book { ProductPlacementvonAutomobilherstellernininternationalenKinofilmen,
    title = "Product Placement von Automobilherstellern in internationalen Kinofilmen",
    author = "Helge {Wittkugel}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832495213",
    url = "https://m.diplom.de/document/224648"
}