Anjely, N. and Siregar, P.P. 2026. The Influence of the Level of Knowledge of Students’ Parents at Muhammadiyah 20 Medan Private Elementary School About Antibiotics on The Perception of Chronic Cough Symptoms. JIKES : Jurnal Ilmu Kesehatan. 5, 1 (Sep. 2026), 992–999. DOI:https://doi.org/10.71456/jik.v5i1.2658.