1. M. Izzatin, S. B Waluyo, Rochmad, and Wardono, “Students’ cognitive style in mathematical thinking process,” Journal of Physics: Conf. Series, vol 1613, pp. 1-4, 2020.
2. Kemendikbud, Peringkat dan Capaian PISA in https://www.kemdikbud.go.id, 2016.
3. A. Khairi, R. N. Sasongko, and M. Kristiawan, “Literacy of lower classes students primary school in the 2013 curriculum during the pandemic covid-19,” Linguistic, English Education and Art, vol 4, pp. 375-386, 2021.
4. S. Maslihah, S. B. Waluya, and A. Suyitno, “The role of mathematical literacy to improve high order thinking skills,” Journal of Physics: Conf. Series, vol 1539, pp. 1-6, 2020.
5. T. S. Mislia, S. Indartono, and V. Mallisa, “Improving critical thinking among junior high school students through assassment of higher-level thinking skills,” Advances in Social Science, Education and Humanities Research, vol 323, pp 326-333, 2019.