Nurmahawi, Lisa, et al. “304. Improving Students Learning Outcomes through the STAD Model in English Lesson ”. Prosiding Seminar Nasional Pendidikan Profesi Guru, vol. 1, no. 1, July 2023, pp. 2721-7, https://conference.upgris.ac.id/index.php/psnppg/article/view/4009.