Lim Hooi, Lian, Yew Wun Thiam, and Noraini Idris. 2019. “A Framework to Evaluate the Ability of Student Algebra Solutions in the Function Concepts (58 - 79)”. Jurnal Pendidikan Bitara UPSI 3 (1):58-79. https://ejournal.upsi.edu.my/index.php/JPB/article/view/2393.