APA-čujuhus (7. p.)
Nigeria. Federal Inland Revenue Service, ebrary, Inc, & Okauru, I. O. (2012). A comprehensive tax history of Nigeria. Safari Books.
Chicago-čujuhus (17. p.)
Nigeria. Federal Inland Revenue Service, Inc ebrary, juo Ifueko Omoigui Okauru. A Comprehensive Tax History of Nigeria. Ibadan, Nigeria: Safari Books, 2012.
MLA-čujuhus (9. p.)
Nigeria. Federal Inland Revenue Service, et al. A Comprehensive Tax History of Nigeria. Safari Books, 2012.
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