JUNAIDI; KHAIRUL ASRI. Pengembangan Alat Ukur Kepercayaan Diri Atlet Bulutangkis. Jurnal Kinerja Kependidikan (JKK): Facilities of Educator Career and Educational Scientific Information, [S. l.], v. 4, n. 3, p. 670–677, 2024. DOI: 10.32672/jkk.v4i3.240. Disponível em: https://www.journalserambi.org/index.php/jkk/article/view/240. Acesso em: 2 oct. 2025.