Zahro, Shofi Hikmatus. “Study Literature Review : The Effect of Lockdown on the Covid19 Pandemic Period on Air Quality”. JURNAL KESEHATAN LINGKUNGAN 12, no. 1si (September 30, 2020): 11–20. Accessed August 3, 2024. https://e-journal.unair.ac.id/JKL/article/view/20773.