@book { ProfessionalisierungimSponsoringManagementprozess,
    title = "Professionalisierung im Sponsoring-Managementprozess",
    author = "Oliver {Smykacz}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842808041",
    url = "https://m.diplom.de/document/228194"
}