Akrom, Muhamad, et al. “Implementation of Jarimatika Method to Improve Multiplication Calculation Ability in Grade III Elementary School Students”. Jurnal Pendidikan, Sains, Geologi, Dan Geofisika (GeoScienceEd Journal), vol. 5, no. 4, Nov. 2024, pp. 1002-8, doi:10.29303/goescienceed.v5i4.444.