@book { DiemateriellenFormendesSozialenDasFuballstadion,
    title = "Die materiellen Formen des Sozialen: Das Fußballstadion",
    author = "Sebastian {Werfel}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/286206"
}