Purnomo, Yoppy Wahyu, Masitah Shahrill, Olivia Pandansari, Rika Susanti, and Winarni Winarni. 2022. “Cognitive Demands on Geometrical Tasks in Indonesian Elementary School Mathematics Textbook”. Jurnal Elemen 8 (2):466-79. https://doi.org/10.29408/jel.v8i2.5235.