“PENERAPAN MODEL PROBLEM BASED LEARNING DAN PROBLEM SOLVING TERHADAP HASIL BELAJAR IPA SISWA KELAS IV GUGUS SUDIRMAN”. JS (JURNAL SEKOLAH), vol. 2, no. 2, Apr. 2018, pp. 60-68, https://doi.org/10.24114/js.v2i2.9515.