Astuti, Z., and M. Jannah. “The Willingness of Bystander to Perform CPR to the Patient With Out of Hospital Cardiac Arrest During the Pandemic Covid 19: A Literature Review”. Proceedings of the International Conference on Nursing and Health Sciences, Vol. 2, no. 2, Nov. 2021, pp. 67-74, doi:10.37287/picnhs.v2i2.831.