1. Ary, D., Jacobs, L. C., Sorensen, C., & Walker, D. A. (2014). Introduction to research in education. USA: Cengage Learning.
2. Asadi, E., & Motallebzadeh, Kh. (2013). Classroom observation: A factor for Iranian EFL teachers' professional development and their students' achievements. Special Issue on Teaching and Learning, 2 (2), 523-532.
3. The COACTIV Model of Teachers’ Professional Competence
4. In the eyes of Turkish EFL learners: what makes an effective foreign language teacher?
5. Creswell, J. W. (2013). Qualitative inquiry and research design: Choosing among five approaches (3rd Ed.). Thousand Oaks, CA: Sage