Zuindra, Z., Chitra, B. P., & Geubrina, M. (2020). “English Polite Utterances” Terhadap Siswa/i Kelas XII SMA Nurul Hasanah Medan. JPM: Jurnal Pengabdian Masyarakat, 1(2), 48-52. Retrieved from https://mail.djournals.com/jpm/article/view/109