R. A. Sandika and D. Novita, “The Influence of Digital Comics in Teaching Grammar for EFL Students during the COVID-19 Pandemic : Pengaruh Komik Digital dalam Pengajaran Grammar untuk Siswa EFL selama Pandemi COVID-19”, acopen, vol. 4, p. 10.21070/acopen.4.2021.2853, Jun. 2021.