@book { SponsoringalskommunikationspolitischesInstrumentimSektorSport,
    title = "Sponsoring als kommunikationspolitisches Instrument im Sektor Sport",
    author = "Mark {Fohrer}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832488154",
    url = "https://m.diplom.de/document/223995"
}