Federal Inland Revenue Service. FIRS Handbook on Reforms in the Tax System 2004-2011. Safari Books.
芝加哥风格引文Federal Inland Revenue Service. FIRS Handbook on Reforms in the Tax System 2004-2011. Safari Books.
MLA引文Federal Inland Revenue Service. FIRS Handbook on Reforms in the Tax System 2004-2011. Safari Books.
警告：这些引文格式不一定是100％准确.