Nurjannah, Tri, and Ishafit Ishafit. “Development of Problem-Based Student Worksheets to Improve Students’ Numeracy Skills in Managing Household Electricity Usage”. Jurnal Pendidikan Fisika Dan Teknologi, vol. 11, no. 1a, Sept. 2024, pp. 148-55, doi:10.29303/jpft.v11i1a.9763.