Trihadidin, N., and B. Sutrisno. “Improved High Jump Learning With Rubber Bracelets”. Prosiding Seminar Nasional Pendidikan Jasmani Dan Kesehatan, Vol. 1, no. 1, Dec. 2021, pp. 193-05, http://ejournal.fkip.unsri.ac.id/index.php/semnaspenjas/article/view/202.