Diana, Ilfi Nur, et al. “Osing House Ethnomathematics LKPD Development to Strengthen Elementary Students’ Flat Shape Area Comprehension”. Didaktika: Jurnal Kependidikan, vol. 15, no. 2 Mei, May 2026, pp. 3141-52, https://doi.org/10.58230/27454312.3897.