Hobri, H., M. A. K. Putri, R. P. Murtikusuma, E. Oktavianingtyas, and D. S. Pambudi. “Developing Student Worksheet for Grade Seven on Social Arithmetics and Its Use in Flipped Classroom Blended Learning”. Edumatica : Jurnal Pendidikan Matematika, vol. 11, no. 01, Apr. 2021, pp. 1-11, doi:10.22437/edumatica.v11i01.12032.