Arief, M. Yudistira, et al. “The Result of Physical Fitness Learning in Sman 36 Jakarta During the Covid-19 Pandemic”. Gladi : Jurnal Ilmu Keolahragaan, vol. 13, no. 02, July 2022, pp. 178-90, https://journal.unj.ac.id/unj/index.php/gjik/article/view/25969.