Mardhiko, A., Zaharuddin, Z., & Supriyadi, S. (2025). The Influence of Leadership and Co-Worker Relationships on Employee Productivity at the Main Clinical Laboratory of Siaga Medika Jakarta. International Journal of Business, Law, and Education, 6(1), 315 - 325. https://doi.org/10.56442/ijble.v6i1.1021