Yulia Delfahedah. “Determinants of the Behavior of Hotel Employees on the Use of Personal Protective Equipment (PPE) at Simalungun City Hotel”. International Journal of Public Health Excellence (IJPHE) 2, no. 1 (December 30, 2022): 416–420. Accessed November 24, 2024. https://ejournal.ipinternasional.com/index.php/ijphe/article/view/322.