Sidabutar, Sondang Sidabutar, and Candra Johan Waruwu. 2022. “Metode Ceramah Dan Media Leaflet Terhadap Pengetahuan Ibu Dalam Pencegahan ISPA”. Window of Health : Jurnal Kesehatan 5 (4), 706-12. https://doi.org/10.33096/woh.v5i04.16.