Relationship Between Worker Age And Work Shifts With Work Fatigue Among Security Guards At Pt. Pertamina Geothermal Energy Area Lahendong. preventif [Internet]. 2026 Apr. 29 [cited 2026 Apr. 29];17(1):90-102. Available from: https://jurnal.fkm.untad.ac.id/index.php/preventif/article/view/2447