Rahmawati, Elviana Lia, Murti Ayu Wijayanti, and Yusti Fargianti. 2024. “Using Busuu App to Learn Vocabulary For 7th-Grade of SMP Istafad”. English Education:Journal of English Teaching and Research 9 (1), 49-60. https://doi.org/10.29407/jetar.v9i1.21283.