H. I. M. Shahbani, S. A. Rashid, M. S. Abu Bakar, J. M. Jamil, and I. N. M. Shaharanee, “Effect of Small Private Online Course (SPOC) on Students’ Achievement in Pre-University Chemistry”, IJLTER, vol. 19, no. 7, pp. 189–203, Jul. 2020.