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Diakses pada 3 September 2020CDC. https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/how-to-wash-cloth-face-coverings.html
Diakses pada 3 September 2020Johns Hopkins Medicine. https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/coronavirus-how-to-care-for-your-face-mask
Diakses pada 3 September 2020