Nurhartanto, A., T. D. Wengrum, and W. Rahmawati. “Are Students Motivated Enough?: A Study of Students’ Motivation in Online English Course”. IJLHE: International Journal of Language, Humanities, and Education, vol. 6, no. 2, Dec. 2023, pp. 129-40, https://jurnal.stkippgribl.ac.id/index.php/ijlhe/article/view/1365.