Suwardianto, H. et al. 2021. Safety Use Of Personal Protective Equipment (PPE) to Anxiety During The Covid-19 Pandemic On Nurses. STRADA : Jurnal Ilmiah Kesehatan. 10, 2 (Nov. 2021), 1493–1498. DOI:https://doi.org/10.30994/sjik.v10i2.853.