1. Ministry of Education Malaysia [MOE]. Malaysia Education Blueprint 2013 - 2025: Preschool to Post-Secondary Education. Ministry of Education Malaysia (2013).
2. I. V. S. Mullis, M. O. Martin, P. Foy, D. L. Kelly, and B. Fishbein, TIMSS 2019 International Results in Mathematics and Sciences, (2020). Retrieved from https://timssandpirls.bc.edu/timss2019/international-results/
3. THE TEACHING OF HIGHER ORDER THINKING SKILLS (HOTS) IN MALAYSIAN SCHOOLS: POLICY AND PRACTICES
4. B. S. Bloom, (Ed.). Taxonomy of educational objectives. Handbook I: The cognitive domain. New York, NY: McKay (1956).
5. L. W. Anderson, and D. R. Krathwohl, A Taxonomy for Learning, Teaching, and Assessing: A Revision of Bloom’s Taxonomy of Educational Objectives (2001).