1Creswell, J. W., & Piano Clark, V. L. (2007). Designing and conducting mixed methods research (2nd ed.). Thousand Oaks, C.A.: SAGE Publications, Inc.
2Dornyei, Z. (2001). Teaching and researching motivation. London: Longman.
3Domyei, Z. (2003). Attitudes, orientation, and motivations in language learning: Advances in theory, research, and applications. Language Learning, 53(sup.), 332.
4Gardner, R. C. (1985). Socialpsychology andsecond language learning. London: Edward Arnold Ltd..
5Gardner, R. C., & Lambert, W. E. (1959). Motivational variables in second language acquisition. Canadian Journal of Psychology, 13, 266-272.
6Guba, E. G., & Lincoln, Y. S. (1994). Competing paradigms in qualitative research. In N. K. Denzin & Y. S. Lincoln (Eds.), The handbook of qualitative research (pp. 105-117). Thousand Oaks, C.A.: SAGE Publications, Inc.
7Johnson, R. B., Onwuegbuzie, A. J., & Turner, L. A. (2007). Toward a definition of mixed methods research. Journal of Mixed Methods Research, 1(2), 112-133.
8Mclnerney, D. M. (1998). Multidimensional aspects of motivation in cross-cultural settings and ways of researching this. Paper presented at the American Educational Research Association Annual Meeting.
9Nunan, D. (1992). Research methods in language learning. Cambridge: Cambridge University Press.
10Tashakkori, A., & Teddlie, C. (1998). Mixed methodology: Combining qualitative and quantitative approaches. Applied social research methods series (Vol. 46). Thousand Oaks, C.A.: SAGE Publications, Inc..
