An analysis of Indonesian student-level boxing athletes: What Effect Does Competition Anxiety Have on Self-Efficacy? - Saniah, Saniah; Sukamti, Endang Rini; Chaeroni, Ahmad; Prayoga, Hegen Dadang; Prabowo, Trisnar Adi; Suganda, Mikkey Anggara; Suryadi, Didi; Abdullah, Nagoor Meera Bin; Gogoi, Hemantajit; Poralan, Porferia S.; Maulana, Ahmad; Habibie, Muhammad; et al. (Retos: Nuevas Perspectivas de Educación Física, Deporte y Recreación, 2024)