Hotmaria, Pardede H, Sinurat B. The Effect of Small Group Discussion on the Students’ AbilityinSpeaking English at Grade VIII of SMP Negeri 2 Siantar. JETAFL [Internet]. 2019Dec.30 [cited 2024May16];5(2):42-57. Available from: https://ejournal.uhn.ac.id/index.php/jetafl/article/view/123