Sitepu, Roslenni, et al. “Improved Knowledge of COPD Management through a Health Education Intervention: A Study at Vina Estetica Hospital, Medan”. Buletin Kedokteran & Kesehatan Prima, vol. 5, no. 1, Feb. 2026, pp. 57-61, doi:10.34012/bkkp.v5i1.8063.