1. Anderson, R., Spiro, R., & Montague, W. (1977). Schooling and the acquisition of knowledge. Hillsdale NJ: Erlbaum.
2. Bae, J. (2011). Teaching Process Writing for Intermediate/Advanced Learners in South Korea. Wisconsin, United States: University of Wisconsin-River Falls.
3. Brown, H.D. (1994) Teaching byprinciples: An interactive approach to language pedagogy. Up-per Saddle, N.J.: Prentice Hall
4. Burns, A. (1999)Collaborative Action Research for English Language Teachers. Cambridge University Press
5. Cozby, P. C. (1997). Methods in behavioral research (6th ed.).Mountain View, CA: Mayfield.