Nurhisyam, R., Usman, S., Agussatriana, A., & Rofiqoh, R. (2023). UNIVERSITY STUDENTS’ PERCEPTION IN LEARNING VOCABULARY THROUGH DUOLINGO. E-Journal of ELTS (English Language Teaching Society), 10(3), 295–305. https://doi.org/10.22487/elts.v10i3.3189