Retnowati, E., M. Kemarauwana, U. P. . Lestari, R. Mardikaningsih, and B. Purwantiningsih. “Employee Performance Development Through Work Ability, Motivation, and Leadership”. International Journal of Service Science, Management, Engineering, and Technology, vol. 1, no. 1, Feb. 2022, pp. 11-15, https://ejournalisse.com/index.php/isse/article/view/3.