Sabrina, Saskia, and Burhannudin Ichsan. “Hubungan Kebiasaan Merokok Dan Penderita Covid-19: Studi Literatur”. Prosiding University Research Colloquium (May 27, 2021): 508–512. Accessed April 29, 2025. https://repository.urecol.org/index.php/proceeding/article/view/1439.