Nurhidayat, W., Salsabilla, S., Maulana, M. F., & Ernirita. (2026). The Effectiveness of Balloon-Blowing Therapy in Improving Oxygen Saturation in Patients with Chronic Obstructive Pulmonary Disease (COPD): A Case Study. INDOGENIUS, 5(3), 678–684. https://doi.org/10.56359/igj.v5i3.1076