THENU, Joan Rafael; HIDAYAT, Yusuf; FIRMANSYAH, Helmy. The Effect of Imagery on Reducing Anxiety and Improving Concentration in Gymnastics Performance. Indonesian Journal of Sport Management, [S. l.], v. 5, n. 4, p. 935–948, 2025. DOI: 10.31949/ijsm.v5i4.16491. Disponível em: https://www.ejournal.unma.ac.id/index.php/ijsm/article/view/16491. Acesso em: 13 jun. 2026.