Tarihoran, Sasmita, and Jufrizal Jufrizal. “The Effective Level of Intensive English Program on English Speaking Proficiency in First Year University Students”. Indonesian Journal of Foreign Language Studies 3, no. 1 (June 29, 2026): 29–39. Accessed June 30, 2026. https://indofes.org/index.php/journal-indofes/article/view/33.