HARMEN, Hilma; WATI, Aprina; HUTAPEA, Marsela Natalie; TAMBUNAN, Indah Permatasari; AULIA, Dina; SAMUEL, Zsevta; HASIBUAN, Najwa Aulia Putri. Peningkatan Efektivitas Komunikasi Vertikal: Pendekatan Analisis Terhadap Dinamika Interaksi di Perusahaan PT Pos Medan. As-Syirkah: Islamic Economic & Financial Journal, [S. l.], v. 3, n. 2, p. 874–882, 2025. DOI: 10.56672/5h3nhw07. Disponível em: https://journal-ikadi.com/ojs/index.php/assyirkah/article/view/255. Acesso em: 6 jul. 2026.