Wijayanti, Ni Putu Nita, Deny Pradana Saputro, Oca Fernandes AF, and Raja Febri. “Ladder Drill Portable: Agility Tools for Sports”. Journal Sport Area 6, no. 1 (March 25, 2021): 98–108. Accessed April 26, 2024. https://journal.uir.ac.id/index.php/JSP/article/view/5912.