PRANYOTO, Fajar Setyo and SUHARJANA, Suharjana. The influence of agility hurdle drills, agility ring drills and speed exercises on determination. Quality in Sport. Online. 31 December 2019. Vol. 5, no. 4, pp. 21-27. [Accessed 9 January 2026]. DOI 10.12775/QS.2019.021.