Lilis Juliyanty Marbun, Rustam. THE ROLE OF THE HEAD OF ADMINISTRATIVE OFFICE IN ADMINISTRATION TO IMPROVE CORRESPONDENCE MANAGEMENT AT MAN 1 MEDAN. SJIIPS [Internet]. 2026 Jun. 22 [cited 2026 Aug. 15];15(2):1984-9. Available from: https://ejournal.unibabwi.ac.id/index.php/sosioedukasi/article/view/8167