K Thilagavathy A/P M. Krishnasamy, Siti Salina Mustakim, Tham Jia Hao , Asnul Dahar Minghat and Tajularipin Sulaiman. “An Evaluation on The Implementation of International General Certificate in Secondary Education (IGCSE) Curriculum towards International Assessment Benchmark”. International Journal of Advanced Science and Technology, Vol. 29, no. 9s, May 2020, pp. 981 -91, https://sersc.org/journals/index.php/IJAST/article/view/13366.