@book { Venezuela,
    title = "Venezuela",
    subtitle = "Merkmale und Ursachen einer defekten Demokratie in Lateinamerika",
    author = "Mathias {Köster}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/223289"
}