1. Alias, N., Siraj, S., Rahman, M. N. A., & Dewitt, D. (2017). Homeschooling in Malaysia: The implications for teacher services. MOJEM: Malaysian Online Journal of Educational Management, 1(2), 10-18.
2. Bandura, A. (1985). Model of causality in social learning theory. In Cognition and psychotherapy (pp. 81-99). Springer, Boston, MA.
3. Bandura, A., & Walters, R. H. (1977). Social learning theory (Vol. 1). Englewood Cliffs, NJ: Prentice-hall.
4. Castillo-Montoya, M. (2016). Preparing for Interview Research: The Interview Protocol Refinement Framework. Qualitative Report, 21(5).
5. Cox, D. D. (2005). Evidence-based interventions using home-school collaboration. School
a. Psychology Quarterly, 20(4), 473–497. doi:10.1521/scpq.2005.20.4.473.
6. Creswell, J. W., & Miller, D. L. (2000). Determining validity in qualitative inquiry. Theory into practice, 39(3), 124-130.
7. Denzin, N. (1978) Sociological Methods: A Sourcebook. NY: McGraw!Hill.
8. Eich, D. (2008). A Grounded Theory of High-Quality Leadership Programs. Journal of Leadership & Organizational Studies, 15(2), 176–187.
9. Gentles, S. J., Charles, C., Ploeg, J., & McKibbon, K. A. (2015). Sampling in qualitative research: Insights from an overview of the methods literature. The qualitative report, 20(11), 1772-1789.
10. Hallinger, P. (2011). Leadership for learning: Lessons from 40 years of empirical research. Journal of educational administration.
11. Hallinger, P. (2003), “Leading educational change: reflections on the practice of instructional and transformational leadership”, Cambridge Journal of Education, Vol. 33 No. 3, pp. 329-51.
12. Heck, R.H. and Hallinger, P. (2009), “Assessing the contribution of distributed leadership to school improvement and growth in math achievement”, American Educational Research Journal, Vol. 46 No. 3, pp. 626-58.
13. Kline, W. B. (2008). Developing and submitting credible qualitative manuscripts. Counselor Education and Supervision, 47(4), 210-217.
14. Kozulin, A., & Presseisen, B. Z. (1995). Mediated learning experience and psychological tools: Vygotsky’s and Feuerstein’s perspectives in a study of student learning. Educational Psychologist, 30(2), 67–75. doi:10.1207/s15326985ep3002_3.
15. Laal, M., & Ghodsi, S. M. (2012). Benefits of collaborative learning. Procedia - Social and Behavioral Sciences, 31, 486–490. doi:10.1016/j.sbspro.2011.12.091.
16. Lincoln, Y.S., & Guba, E.G. (1985). Naturalistic inquiry. Newbury Park, CA: Sage.
17. MacBeath, J. and Dempster, N. (eds) (2008) Connecting Leadership for Learning: Principles for Practice. Routledge: London.
18. Merriam, S. B. (1989). Contributions of qualitative research to adult education. Adult Education Quarterly, 39(3), 161-168.
19. Merriam, S. B. (2002). Introduction to qualitative research. Qualitative research in practice: Examples for discussion and analysis, 1(1), 1-17.
20. Merriam, S. B. (1998). Qualitative Research and Case Study Applications in Education. Revised and Expanded from" Case Study Research in Education.". Jossey-Bass Publishers, 350 Sansome St, San Francisco, CA 94104.
21. Savaya, R., & Gardner, F. (2012). Critical reflection to identify gaps between espoused theory and theory-in-use. Social work, 57(2), 145-154.
22. Swaffield, S. and MacBeath, J. (2009) Researching Leadership for Learning across International and Methodological Boundaries. AERA Annual Meeting, San Diego, CA.
23. Turner, J. H. (2001). Handbook of sociological theory. Kluwer Academic/Plenum Publishers.
24. van Leeuwen, A., & Janssen, J. (2019). A systematic review of teacher guidance during collaborative learning in primary and secondary education. Educational Research Review.
25. Yin, R. K. (2014). Case study research: Design and methods (applied social research methods). Thousand Oaks, CA: Sage publications.
26. Yin, R. K. (1994). Discovering the future of the case study. Method in evaluation research. Evaluation practice, 15(3), 283-290.
27. Zeegers, M., & Barron, D. (2015). Milestone Moments in Getting Your PhD in Qualitative Research. Chandos Publishing.