@book { VermarktungsprozesseinderFuballBundesliga, title = "Vermarktungsprozesse in der Fußball-Bundesliga", author = "Hartmut {Hiestermann}", year = "1999", publisher = "Diplom.de", address = "Hamburg, Deutschland", doi = "10.3239/9783832417772", url = "https://m.diplom.de/document/217638" }