Setyarini, Tri Kartika, Aisyah Lahdji, and Isna Zalwa Noor Fajri. “Pneumonia Degree Correlation in Children With Clean and Healthy Behavior (CHB)”. Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya 4, no. 2 (July 29, 2020): 217–223. Accessed January 15, 2025. https://journal.um-surabaya.ac.id/qanunmedika/article/view/4269.