Sinta, D., R. Rajindra, and G. Guasmin. “Analysis of the Operational Cost Budget As a Tool for Planning and Controlling Operational Costs at the Regional Water Company of Donggala Regency”. International Journal of Health, Economics, and Social Sciences (IJHESS), Vol. 3, no. 4, Oct. 2021, pp. 282-6, doi:10.56338/ijhess.v3i4.1902.