Pasa, Bimo, and Budi Prabowo. “The Influence of Electronic Word of Mouth, Perceived Ease of Use, and Digital Marketing on the Usage Decision of Duolingo Application Among Generation Z in Surabaya City”. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) 9, no. 2 (July 20, 2026): 16393-16404. Accessed October 13, 2026. https://e-journal.uac.ac.id/index.php/iijse/article/view/9915.