Zulkarnain, Zulkarnain, Nia Astuti, and Bidarita Widiati. “The Correlation Between Self-Confidence, Self-Efficacy And Speaking Ability”. Inovasi: Jurnal Diklat Keagamaan 17, no. 1 (July 7, 2023): 11–20. Accessed November 5, 2024. https://bdksurabaya.e-journal.id/bdksurabaya/article/view/383.