@book { TheeconomicRelationsbetweenChinaandNigeria,
    title = "The economic Relations between China and Nigeria",
    author = "Lawrence { Okolo Abutu }",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656341277",
    url = "https://www.hausarbeiten.de/document/206204"
}