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), pp. 670–677. doi: 10.32672/jkk.v4i3.240.