http://www.vistawide.com/languages/languagetips.htm

http://www.language-learning-advisor.com/

http://www.english-zone.com/study/langs.html

http://www.utexas.edu/student/utlc/lrnres/handouts/1705.html

http://www.utexas.edu/student/utlc/lrnres/handouts/1705.html