Saragih, Kerin Theresa, and Salmah Naelofaria. “Pengaruh Metode Pembelajaran Drill Terhadap Kemampuan Menulis Surat Resmi Siswa Kelas VII SMP Negeri 5 Pematangsiantar ”. Innovative: Journal Of Social Science Research 4, no. 6 (December 8, 2024): 2016–2025. Accessed July 16, 2026. https://j-innovative.org/index.php/Innovative/article/view/10484.