Hidayati, Tuti, and Thayyibatul Endayani. “Smartphones to Learn English: The Use of Android Applications by Non-English Major Students in West Aceh”. Jurnal Ilmiah Peuradeun, vol. 7, no. 1, Jan. 2019, pp. 95-112, https://doi.org/10.26811/peuradeun.v7i1.231.