Lilis Juliyanty Marbun and Rustam (2026) “THE ROLE OF THE HEAD OF ADMINISTRATIVE OFFICE IN ADMINISTRATION TO IMPROVE CORRESPONDENCE MANAGEMENT AT MAN 1 MEDAN”, SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL, 15(2), pp. 1984–1994. doi: 10.36526/sosioedukasi.v15i2.8167.