Siahaan, Maranatha Duva, Ashri Yudhistira, and Sabri. “Knowledge Level of Gracia Sustain Foundation TK SD Medan Teachers about Acute Otitis Media”. Journal of Endocrinology, Tropical Medicine, and Infectious Disease (JETROMI) 4, no. 4 (January 25, 2024): 191–198. Accessed September 21, 2026. https://idjpcr.usu.ac.id/jetromi/article/view/14911.