@book { MarketingimplementierunginNonProfitKulturbetrieben,
    title = "Marketingimplementierung in Non-Profit-Kulturbetrieben",
    author = "Susanne {Ackermann}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832424800",
    url = "https://m.diplom.de/document/218276"
}