Supriatna, Eka. “Metode Playometrik Terhadap Kemampuan Spike Siswa Akademi Bola Voli Yuso ”. Innovative: Journal Of Social Science Research, vol. 3, no. 5, Oct. 2023, pp. 2955-63, https://j-innovative.org/index.php/Innovative/article/view/5191.