Handayani, N. S., B. D. . Putri, and I. M. . Ramdan. “What Is the COVID-19 Risk Zone Colours Impact: Health Related-Quality of Life of Indonesian Healthcare Workers”. The Indonesian Journal of Occupational Safety and Health, vol. 14, no. 2, Aug. 2025, pp. 230-41, https://e-journal.unair.ac.id/IJOSH/article/view/56722.