[1]
M. A. Mahbub, A. Romsi, S. Bulqiyah, and I. A. Firdaus, “INFUSING A GAMIFICATION MECHANISM THROUGH DUOLINGO FOR ENGLISH SPEAKING PROFICIENCY: PERCEPTIONS OF THE INDONESIAN EFL INSTRUCTOR AND STUDENTS”, konstruk, vol. 12, no. 1, pp. 69-80, Jan. 2020.