Satiti, W., and S. Dwi Agustina. “PENGEMBANGAN SOAL MATEMATIKA MODEL PISA KATEGORI FORMULATE UNTUK PESERTA DIDIK SMP/MTS”. JoEMS (Journal of Education and Management Studies), Vol. 4, no. 5, July 2021, pp. 61-68, doi:10.32764/joems.v4i5.578.