1. Alvesson, M. (2004). Reflexive methodology: New vistas for qualitative research. SAGE.
2. Alvesson, M., & Skoldburg, K. (2000). Reflexive methodology. SAGE.
3. Attia, M., & Edge, J. (2017). Be(com)ing a reflexive researcher: A developmental approach to research methodology. Open Review of Educational Research, 4(1), 33–45.
4. Brahler, C. (2018). Chapter 9 “Validity in Experimental Design”. University of Dayton. https://www.coursehero.com/file/30778216/CHAPTER-9-VALIDITY-IN-EXPERIMENTAL-DESIGN-KEYdocx/. (Accessed 27 May 2021).
5. Brown, J. D. (1996). Testing in language programs. Prentice Hall Regents.