Wahyudi, Dendi, Affan Rafi, Aan Farhan, and Tri Ngudi Wiyatno. “The Influence of Skill Level, Work Discipline and Work Environment on the Work Productivity of Tire Building Employees PT. Ban Indonesia”. Formosa Journal of Sustainable Research 3, no. 6 (July 4, 2024): 1345–1358. Accessed June 24, 2026. https://journal.formosapublisher.org/index.php/fjsr/article/view/9991.