Sipahutar, Sarmaida, 		Siboro, Hari, AND 		Damanik, Dede.
" PENGARUH PROBLEM BASED LEARNING BERBANTUAN ALAT PERAGA TERHADAP HASIL BELAJAR FISIKA SISWA KELAS   X MIA SMA SWASTA GKPI  PADANG BULAN MEDAN   TAHUN AJARAN 2021/2022" <em>JURNAL PENELITIAN FISIKAWAN</em> [Online], Volume 5 Number 1 (28 February 2022)