Destiawati, Laela, Vania Zulfa, and Jaka Marsita. “The Effect of Self-Confidence on Students’ English Speaking Ability in Front Office Subjects at State Vocational School 32 Jakarta”. International Education Trend Issues 2, no. 2 (July 22, 2024): 225 -. Accessed July 22, 2025. https://ijble.com/index.php/ieti/article/view/761.