Martinez-Vazquez, Jorge (2008) - UES
Comprehensive databases of regional tax information from around the world. Checkpoint provides U.S. tax laws and analysis, along with both translated and primary source tax...
compiled by Oscar Cetrángolo and Juan Carlos Gómez-Sabaini (2006) - UES
United Nations (2001) - UES; STA/ESA/PAD/SER.E/21 (pdf, 2001).
Chaturvedi, K. N. (2008) - LES
Practicing Law Institute (PLI) - Westlaw: PLIREF-TAX
edited by Michael Lang (2009)
Kleinfeld, Denis A. (2000-) - UES; (Westlaw: PLIREF-INTXTP) (Lexis: ITAXPL).