@book { Kultursponsoring,
    title = "Kultursponsoring",
    subtitle = "Methodische Aspekte und Perspektiven der Sponsoringkontrolle",
    author = "Silke {Kellner}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832402693",
    url = "https://m.diplom.de/document/216256"
}