UTIARAHMAN, R.; JUSUF, H.; MAKSUM, T. S. Analysis of Work Shifts and Mental Workload with Work Fatigue in Water Treatment Plant Operators at Perumdam Muara Tirta Gorontalo City Using NASA-TLX and SOFI Methods. International Journal of Health, Economics, and Social Sciences (IJHESS), v. 7, n. 2, p. 754~760, 24 Apr. 2025.