Hasibuan AA. EFFORTS TO IMPROVE THE LEARNING RESULTS OF REJECTED BULLETS THROUGH THE MODIFICATION OF LEARNING MEDIA IN VII GRADE STUDENTS OF SMP NEGERI 3 PERCUT SEI TUAN, 2014/2015 ACADEMIC YEAR. JPHR [Internet]. 2020 Nov. 16 [cited 2026 Oct. 27];1(1):24-8. Available from: https://jurnal.stokbinaguna.ac.id/index.php/JPHR/article/view/158