@book { BundesligavereinealsMarkenundSponsoringpartner,
    title = "Bundesligavereine als Marken und Sponsoringpartner",
    author = "Sebastian {Böttcher}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832475840",
    url = "https://m.diplom.de/document/222861"
}