Sitorus, Nurianti, Andrian, Yusnia Sinambela, and Juwairiah. “Designing Materials for Vocational Students to Enhance Virtual Learning Experience Utilising Android for Studying English”. Instal : Jurnal Komputer 16, no. 01 (February 24, 2024): 59–67. Accessed April 30, 2026. https://journalinstal.cattleyadf.org/index.php/Instal/article/view/210.