Nugroho, Iman, et al. “Exploring Students’ Speaking Anxiety Factors in an Online EFL Classroom”. INTERACTION: Jurnal Pendidikan Bahasa, vol. 8, no. 2, Oct. 2021, pp. 228-39, https://e-journal.unimudasorong.ac.id/index.php/interactionjournal/article/view/2537.