Pasa, B. and Prabowo, B. 2026. 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, 2 (Jul. 2026), 16393-16404. DOI:https://doi.org/10.31538/iijse.v9i2.9915.