“Development of A Smash Drill Training Model To Improve Smash Accuracy In Extracurricular Volleyball Students In High School/Vocational School”, Compet. J. Pendidik. Kepelatihan Olahraga, vol. 17, no. 2, pp. 1414–1422, Jun. 2025, doi: 10.26858/cjpko.v17i2.127.