Bittker, Boris I.
United States taxation of foreign income and foreign persons
Federal Tax Press, 1968
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Doernberg, Richard L.
International taxation in a nutshell
West , 1993
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Gunadi
Taxation on personal service income: based on income tax law and tax treaty
[publisher not identified], 2001
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Stephan, Paul B.
Federal income taxation
Emmanuel Law Outlines, 1994
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Gaffney, Dennis J.
Principles of federal income taxation
McGraw-Hill, 1982
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