UPAYA PENINGKATAN HASIL BELAJAR DENGAN MODEL PROBLEM BASED LEARNING (PBL) PADA PEMBELAJARAN IPS KELAS V SD IT BALIKPAPAN ISLAMIC SCHOOL . (2020). Prosiding Seminar Nasional PPG Universitas Mulawarman, 1, 49-57. https://doi.org/10.30872/semnasppg.v1.695