TN Visa

http://www.wikihow.com/Get-a-TN-Visa-to-Work-in-the-United-States

http://www.pengweber.com/workvisas/TNvisas.html

http://www.tnvisaexpert.com/articles/tn-visa-employer-letter/

http://www.immigrationdirect.com/visas/work/TN-Visa-Work-Visa-for-Citize...

http://www.usimmigrationsupport.org/visa_tn.html

http://travel.state.gov/visa/temp/types/types_1274.html

http://travel.state.gov/visa/laws/telegrams/telegrams_1422.html

http://www.consular.canada.usembassy.gov/nafta.asp

http://www.worldtradelaw.net/nafta/chap-16.pdf

http://www.green-cards.com/non_us/e1_e2_visa.htm

http://www.grasmick.com/invest.htm