Mendrofa, Krisfan Hermansyah, and Meiman Hidayat Waruwu. “Analysis of Employee Performance Quality Improvement at PT. Pos Indonesia (Persero) Gunungsitoli Branch”. JURNAL ECONOMINA 5, no. 6 (June 30, 2026): 2530–2545. Accessed July 2, 2026. https://ejournal.45mataram.ac.id/index.php/economina/article/view/2696.