@book { DiePersonalbeschaffunginderFuballBundesliga,
    title = "Die Personalbeschaffung in der Fußball-Bundesliga",
    author = "Dominik-Martin {Cieslik}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836630306",
    url = "https://m.diplom.de/document/226835"
}