@book { CorruptionPerceptionIndexEineUrsachenanalyseamFallbeispielNigeria,
    title = "Corruption Perception Index - Eine Ursachenanalyse am Fallbeispiel Nigeria",
    author = "Melanie {Werle}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638603287",
    url = "https://www.hausarbeiten.de/document/67325"
}