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Citace podle Chicago (17th ed.)Nigeria. Federal Inland Revenue Service, Inc ebrary, a Ifueko Omoigui Okauru. A Comprehensive Tax History of Nigeria. Ibadan, Nigeria: Safari Books, 2012.
Citace podle MLA (9th ed.)Nigeria. Federal Inland Revenue Service, et al. A Comprehensive Tax History of Nigeria. Safari Books, 2012.
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