Harahap, Muhammad, and Restu Arini. “English Speaking Training for Hotel Staffs: A Study on Perception”. Jurnal Ilmiah Wahana Pendidikan 10, no. 20 (October 31, 2024): 554-560. Accessed May 22, 2026. https://www.jurnal.peneliti.net/index.php/JIWP/article/view/8720.