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