Amaliyah, Mas, and Noeroel Widajati. “Evaluation of ANSI Z535 Safety Sign Installation”. Folia Medica Indonesiana 57, no. 3 (September 5, 2021): 231–238. Accessed November 28, 2024. https://e-journal.unair.ac.id/FMI/article/view/25293.