YULTISA, N.; MARDIAH, A. The Effect of Using English Slang Words on Students’ Speaking Skill Of The Year 2018/2019 Tenth Grade Students Of Sma Negeri 1 Hinai Kabupaten Langkat. Serunai : Jurnal Ilmiah Ilmu Pendidikan, [S. l.], v. 3, n. 2, p. 108–118, 2018. DOI: 10.37755/sjip.v3i2.33. Disponível em: https://ejournal.stkipbudidaya.ac.id/index.php/ja/article/view/33. Acesso em: 1 nov. 2025.