„Peningkatan Kemampuan Menulis Surat Resmi Siswa Xii Ipa 1 MA USB Filial Man Batam ”. Jurnal Kajian Ilmu Pendidikan (JKIP) 2, no. 1 (octombrie 11, 2021): 1–6. Data accesării iulie 30, 2026. https://journal.al-matani.com/index.php/jkip/article/view/176.