“UTILIZING TIRE AND CARDBOARD JUMP METHOD TO IMPROVE LONG JUMP STYLE OF SQUATTING ABILITY OF IV GRADE STUDENTS AT SD NEGERI 43 PALEMBANG” (2021) Primary: Jurnal Pendidikan Guru Sekolah Dasar, 10(1), pp. 102–110. doi:10.33578/10.33578/jpfkip.v10i1.8121.