Muhammad Arya Putra Fadlillah, Ikhah Malikhah, and Soulthan Saladin Batubara. 2024. “Analysis of Motivation, Work Environment, Competence and Discipline on Employee Performance of PDAM Tirtanadi Sunggal Branch Medan”. International Journal of Integrative Sciences 3 (9):949-60. https://doi.org/10.55927/ijis.v3i9.11425.