1. ACTFL 2014 Program standards for the preparation of foreign language teachers http://www.actfl.org/sites/default/files/pdfs/ACTFLStandardsAPRIL2014.pdf
2. Teachers' pedagogical beliefs and the standards for foreign language learning;Allen;Foreign Language Annals,2002
3. The total physical response approach to second language learning;Asher;Modern Language Journal,1969