Waruwu, Derwin, Idarni Harefa, Yupiter Mendrofa, and Serniati Zebua. “Analisis Efisiensi Sistem Distribusi Logistik Pada Kantor Pos Gunungsitoli”. Management Perspective: Jurnal Penelitian Manajemen 2, no. 3 (August 31, 2025): 161–171. Accessed April 14, 2026. https://www.falulufohalowo.com/index.php/manajemen/article/view/171.