Junaidi, and Khairul Asri. 2024. “Pengembangan Alat Ukur Kepercayaan Diri Atlet Bulutangkis”. Jurnal Kinerja Kependidikan (JKK): Facilities of Educator Career and Educational Scientific Information 4 (3):670-77. https://doi.org/10.32672/jkk.v4i3.240.