Insan, Muhammad Yalzamul, et al. “Exploring the Relationship Between Work Ability, Discipline, and Employee Productivity”. 1St International Conference Epicentrum of Economic Global Framework, vol. 1, no. 1, Aug. 2024, pp. 415-22, https://proceeding.pancabudi.ac.id/index.php/ICEEGLOF/article/view/95.