Zacharia, Nathaniel Jason, Triya Damayanti, and Adityo Wibowo. “Lung Function and Respiratory Symptoms Features of Smoker Among University Students”. Jurnal Respirasi 8, no. 2 (May 31, 2022): 75–80. Accessed August 11, 2024. https://e-journal.unair.ac.id/JR/article/view/34270.