Muhamad Sani, S. A., M. R. Abdullah, and H. Ibrahim. “Assessing the Psychometric Properties of an Instrument Measuring Instructional Strategies, Algebraic Thinking and Flexible Mathematical Thinking: A Pilot Study”. IIUM Journal of Educational Studies, vol. 14, no. 1, Jan. 2026, pp. 59-84, doi:10.31436/ijes.v14i1.657.