Purba R, Aritonang CN. The Effect of Role Playing Strategy on Students’ Speaking Ability At Eighth Grade of SMP Negeri 9 Pematangsiantar. JBL [Internet]. 2022 Apr. 25 [cited 2024 Apr. 29];4(1):13 -. Available from: https://jurnal.usi.ac.id/index.php/bilingual/article/view/376