“PENGARUH MODEL PROBLEM BASED LEARNING TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN IPAS DI KELAS IV SD NEGERI 065012 SIMPANG SELAYANG, MEDAN TUNTUNGAN”. 2026. Universum: Journal of Holistic and Multidisciplinary Perspectives 1 (1): 16-24. https://publicpublication.biz.id/ojs/index.php/universum/article/view/5.