Centers for Disease Control and Prevention. When & how to wash your hands. https://www.cdc.gov/handwashing/when-how-handwashing.html. Updated March 7, 2016. Accessed September 2017.
Centers for Disease Control and Prevention. Standard precautions for all patient care. https://www.cdc.gov/infectioncontrol/basics/standard-precautions.html. Updated January 16, 2017. Accessed September 2017.