Best, J. W., & Kahn, J. V. (2006). Research in education (10th ed.). Boston: Pearson Education.
Brown, J. D., & Rodgers, T. S. (2002). Doing second language research. Oxford: Oxford University Press.
Dörnyei, Z. (2007). Research methods in applied linguistics. Oxford: Oxford University Press.
Duff, P. A. (2008). Case study research in applied linguistics. New York: Lawrence Erlbaum.
Ellis, R. (2010). A principled approach to incorporating second language acquisition research into a teacher education programme. Reflections on English Language Teaching, 9(1), 1-17.
Ellis, R. (2005). Principles of instructed language learning. System, 33(2), 209-224. http://doi.org/ctmvch
Ellis, R. (1994). The study of second language acquisition. Oxford: Oxford University Press.
Gass, S. M., & Selinker, L. (2008). Second language acquisition. An introductory course. (3rd ed.). New York: Routledge
Housen, A., & Pierrard, M. (Eds.). (2005). Investigations in instructed second language acquisition. Berlin: Walter de Gruyter.
Kramsch, C. (2000). Second language acquisition, applied linguistics, and the teaching of foreign languages. The Modern Language Journal, 84(3), 311-326. http://doi.org/dc6bqs
Mackey, A., Gass, S. M. (2005). Second language research: Methodology and design. Mahwah, NJ: Lawrence Erlbaum.
Nunan, D., and Bailey, K. M. (2009). Exploring second language classroom research. Boston: Heinle Cengage Learning.
Tailor, G. (Ed.). (2005). Integrating quantitative and qualitative methods in research. (2nd ed.) Lanham, Maryland: University Press of America.