Henjilito, Raffly, et al. “The Effect Of Training Methods Speed Play On 100 Meter Run Skills: The Effect Of Training Methods Speed Play On 100 Meter Run Skills”. JIPES - JOURNAL OF INDONESIAN PHYSICAL EDUCATION AND SPORT, vol. 7, no. 02, Dec. 2021, pp. 33-40, https://journal.unj.ac.id/unj/index.php/jipes/article/view/23805.