Peningkatan Kemampuan Menulis Surat Resmi Siswa Xii Ipa 1 MA USB Filial Man Batam . JKIP [Internet]. 2021 Oct. 11 [cited 2026 Jul. 30];2(1):1-6. Available from: https://journal.al-matani.com/index.php/jkip/article/view/176