Diana, I.N. et al. 2026. Osing House Ethnomathematics LKPD Development to Strengthen Elementary Students’ Flat Shape Area Comprehension. Didaktika: Jurnal Kependidikan. 15, 2 Mei (May 2026), 3141–3152. DOI:https://doi.org/10.58230/27454312.3897.