@book { DavidBeckhamSportleroderPopstar,
    title = "David Beckham. Sportler oder Popstar?",
    author = "Sebastian {Schütz}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638571111",
    url = "https://www.hausarbeiten.de/document/64239"
}