@book { DerGolfmanagereineBerufsfeldanalyse,
    title = "Der Golfmanager - eine Berufsfeldanalyse",
    author = "Tom {Koethe}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/227863"
}