Trimurtini, SB Waluya, YL Sukestiyarno, and Iqbal Kharisudin. 2023. “Effect of Two-Dimensional Geometry Learning on Geometric Thinking of Undergraduate Students During the COVID-19 Pandemic”. Journal of Higher Education Theory and Practice 23 (3). https://doi.org/10.33423/jhetp.v23i3.5848.