“Supervision, Sanctions, and Leadership As Determining Factors of Employee Work Discipline at the Department of Transportation of Binjai City”. INVEST : Jurnal Inovasi Bisnis dan Akuntansi 6, no. 2 (August 19, 2025): 369–379. Accessed July 30, 2026. https://journal.al-matani.com/index.php/invest/article/view/1517.