“The Effect of Mental Imagery Training on the Performance of Volleyball Athletes in the Extracurricular Activities of MAN 3 Sukabumi”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, vol. 17, no. 2, Aug. 2025, pp. 2049-54, https://doi.org/10.26858/cjpko.v17i2.283.