Marji, M., A. Musta’amal, C. Chidozie, and S. Hassan. “An Action Research on The Effect of Using Real Modeled Object in Teaching Orthographic Drawing Concepts on Students’ Performance”. Jurnal Cendekia : Jurnal Pendidikan Matematika, Vol. 7, no. 2, Apr. 2023, pp. 1192-01, doi:10.31004/cendekia.v7i2.2248.