@book { SymboleimMedienwahlkampf,
    title = "Symbole im Medienwahlkampf",
    author = "Sven {Renkel}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832463113",
    url = "https://m.diplom.de/document/221754"
}