Sylvia, Tiara, and Liber Tommy Hutabarat. “A Development of E-Learning-Based Instructional Media for English At Medan Civil Aviation Academy”. Data Science: Journal of Computing and Applied Informatics 5, no. 1 (January 31, 2021): 1-10. Accessed November 22, 2024. https://talenta.usu.ac.id/JoCAI/article/view/4350.