@book { DasMarketingAuditimKrankenhaus,
    title = "Das Marketing-Audit im Krankenhaus",
    author = "Georg {Brabänder}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836631341",
    url = "https://m.diplom.de/document/226903"
}