Referensi
https://jiemar.org/index.php/jiemar/article/view/31/19
https://e-journal.my.id/jsgp/article/view/293/293
https://edukatif.org/index.php/edukatif/article/view/142/pdf
https://core.ac.uk/download/pdf/328807842.pdf
https://www.edukatif.org/index.php/edukatif/article/view/630/pdf
https://www.halodoc.com/kesehatan/coronavirus
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