Sahara, N., and F. Fitriani. “The Role of Ethnomathematics Based on Traditional Engklek Games in Improving the Ability to Understand Mathematical Concepts Sipirok Muhammadiyah Elementary School Students”. FINGER : Jurnal Ilmiah Teknologi Pendidikan, vol. 1, no. 1, June 2022, pp. 31-35, doi:10.58723/finger.v1i1.23.