Kusmanadi, K. “The Role of the District Head in Improving the Performance of Civil Servants at the Office of the District Head of Galang, Deli Serdang Regency”. Journal La Sociale, Vol. 6, no. 5, Aug. 2025, pp. 1495-01, https://newinera.com/index.php/JournalLaSociale/article/view/5499.