ឯកសារយោង
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Cohen, L., Manion, L., & Morrison, K. (2018). Research methods in education (8th ed.). Routledge.
Gay, L. R., Mills, G. E., & Airasian, P. W. (2012). Educational research: Competencies for analysis and applications (10th ed.). Pearson.
Norton, L. S. (2009). Action research in teaching and learning: A practical guide to conducting pedagogical research in universities. Routledge.