Bimantara, Erwin Satria, et al. “The Effect Of Multiple To Box Jump Training On Blocking Ability In Extracurricular Volleyball At SMP Negeri 11 Kota Bengkulu”. Journal of Multidisciplinary Research, vol. 2, no. 2, Jan. 2026, pp. 51-56, doi:10.70963/jmr.v2i2.448.