Destiawati L, Zulfa V, Marsita J. The Effect of Self-Confidence on Students’ English Speaking Ability in Front Office Subjects at State Vocational School 32 Jakarta. IETI [Internet]. 2024Jul.22 [cited 2026Jan.10];2(2):225 -. Available from: https://www.ijble.com/index.php/ieti/article/view/761