Kim How, R. P. T., H. Zulnaidi, and S. S. Abdul Rahim. “Development of Higher-Order Thinking Skills Test Instrument on Quadratic Equation (HOTS-QE) for Secondary School Students”. Pegem Journal of Education and Instruction, vol. 13, no. 1, Nov. 2022, pp. 379-97, doi:10.47750/pegegog.13.01.41.