@book { InformationsbeschaffungimSponsoringmanagement,
    title = "Informationsbeschaffung im Sponsoringmanagement",
    author = "Robert Karl {Wiegand}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832489519",
    url = "https://m.diplom.de/document/224112"
}