1. The empirical evidence of foreign language study;Adelman;Annals of the American Academy of Political and Social Science,1994
2. American Educational Research Association (AERA) 2006, Spring http://aera.net/uploadedFiles/Journals_and_Publications/Research_Points/AERA_RP_Spring06.pdf
3. American Translators Association (ATA) 2007 http://www.atanet.org/ata_activities/no_trial_without_interpreter.php
4. Competency-based ESL: One step forward or two steps back;Auerbach;TESOL Quarterly,1986