Wilujeng, Hestu. “PROFILE OF STUDENT ALGEBRA THINKING ABILITY BASED ON MATHEMATICAL PRELIMINARY SKILLS”. International Journal of Research -GRANTHAALAYAH 5, no. 11 (November 30, 2017): 210–216. Accessed October 26, 2025. https://granthaalayahpublication.org/journals/granthaalayah/article/view/IJRG17_A11_822.