Yuskandini, T., Y. Wahyuna, and S. Sumarta. “Students’ Perception on Learning Vocabulary through WhatsApp Group Media During Covid-19 Pandemic”. INTERACTION: Jurnal Pendidikan Bahasa, Vol. 8, no. 2, Oct. 2021, pp. 219-27, doi:10.36232/jurnalpendidikanbahasa.v8i2.1335.