Sjaiful, R. L., Purnama, A. A., Hadiyanto, D. N., Yusuf, Y. M., & Ramadhan, M. D. (2022). THE INFLUENCE OF OPERATIONAL PERFORMANCE ON PROFITABILITY (Survey On Regional Drinking Companies (PDAM) In West Java). CENTRAL ASIA AND THE CAUCASUS, 23(1), 3362-3371. https://ca-c.org/CAC/index.php/cac/article/view/305