Medina, Mutiara, et al. “Improving Students’ Vocabulary Mastery by Using Word Chain Game for the Eighth Grade Students of SMP N 2 Bumiayu at Academic Year 2020 2021”. Undergraduate Conference on Applied Linguistics, Linguistics, and Literature, vol. 1, no. 1, Oct. 2021, pp. 337-53, https://conference.upgris.ac.id/index.php/allure/article/view/2023.