Laura Aviana Christie, and Cindy Citya Dima. “Telephone Operator Service Communication (Front Office) With Major Departments Regarding Guest Requests at Gumaya Tower Hotel Semarang”. International Journal of Education, Language, Literature, Arts, Culture, and Social Humanities 1, no. 3 (August 23, 2023): 31–51. Accessed November 22, 2024. https://pbsi-upr.id/index.php/ijellacush/article/view/302.