1. Eric 2005 Five steps to an English only classroom http://www.eslhq.com/forums/esl-articles/5-steps-english-only-classroom-256/
2. Social identity, investment, and language learning;Norton;TESOL Quarterly,1995
3. Ribadeneira , D. 1992 Hispanics say plight ignored in crisis Boston Globe
4. Wright , W. 2009 Primary language support: Facilitating English language development and sheltered content instruction through effective use of students' primary language(s) http://www.niusileadscape.org/bl/primary-language-support-facilitating-english-language-development-and-sheltered-content-instruction-through-effective-use-of-students%E2%80%99-primary-languages-by-dr-wayne-e-wright/