Mutiaraningrum, Ira, and Arif Nugroho. “Smartphone-Based Mobile Assisted Language Learning Application in Higher Vocational Education in Indonesia”. JEES (Journal of English Educators Society) 6, no. 1 (March 2, 2021). Accessed December 21, 2024. https://jees.umsida.ac.id/index.php/jees/article/view/26-34.