Sopyan, Dedi, and M. Gunawan Supiarmo. 2022. “The Effect of Spatial Ability on the Mastery of Mathematical Concepts for Class VIII MTs Nahdlatul Mujahidin NW Jempong”. Jurnal Cendekia : Jurnal Pendidikan Matematika 6 (1), 1184-94. https://doi.org/10.31004/cendekia.v6i1.1350.