Maria, Lasma, Maestro Simanjuntak, Thomas Silangit, and Jekson Martiar Siahaan. “Determinants of Acute Respiratory Infection in Children Under Five in Simalingkar, Medan, North Sumatera”. Journal of Epidemiology and Public Health 5, no. 1 (March 2, 2020): 26–30. Accessed May 2, 2024. https://jepublichealth.com/index.php/jepublichealth/article/view/235.