Qomariyah, Laila Nur, et al. “PENERAPAN MODEL PBLMATEMATIKA MATERI SIFAT-SIFAT BANGUN RUANG KELAS IV SDN 01 SUKOANYAR”. JTIEE (Journal of Teaching in Elementary Education), vol. 2, no. 2, Jan. 2019, pp. 135-42, doi:10.30587/jtiee.v2i2.752.