Yovani Christin Natalia Purba, Yuyun Elizabeth Patras, and Yuli Mulyawati. “PENGARUH PENERAPAN MODEL PROBLEM BASED LEARNING BERBANTUAN MEDIA AUDIO VISUAL TERHADAP HASIL BELAJAR SUBTEMA PELESTARIAN KEKAYAAN SUMBER DAYA ALAM DI INDONESIA”. Didaktik : Jurnal Ilmiah PGSD STKIP Subang, Vol. 9, no. 2, July 2023, pp. 6148 -65, doi:10.36989/didaktik.v9i2.1394.