Vitalii I. Kupaev & Dmitriy A. Osipov. (2020). Elderly age group patients with COPD continuing to smoke -a problem that cannot be ignored. Elsevier.
Chicago Style (17th ed.) CitationVitalii I. Kupaev and Dmitriy A. Osipov. Elderly Age Group Patients with COPD Continuing to Smoke -a Problem That Cannot Be Ignored. Elsevier, 2020.
MLA (9th ed.) CitationVitalii I. Kupaev and Dmitriy A. Osipov. Elderly Age Group Patients with COPD Continuing to Smoke -a Problem That Cannot Be Ignored. Elsevier, 2020.
Warning: These citations may not always be 100% accurate.