1Horwitz, E., M. Horwitz, and J. Cope. (1986). 'Foreign language classroom anxiety'. Modern Language Journal 70; 125-32.
2Maclnytre, P.D. and Gardner, R.C. (1991). Methods and Results in the Study of Anxiety and Language Learning: A Review of the Literature. Language Learning 41,25-57.
3Arnol, J. (1999). Affect in Language Learning. Cambridge: Cambridge University Press.