APA
                Gupta Umesh Kumar, University of Delhi. Faculty of Medical Science. Department of Medicine, Dr K P Mathur Supervisor & University of Delhi. Faculty of Medical Science. Department of Medicine. (1985). Clinical study of chronic obstructive pulmonary disease with special reference to spirometric measurements and arterial blood gas analysis. : .
                
                Chicago
                Gupta Umesh Kumar, University of Delhi. Faculty of Medical Science. Department of Medicine, Dr K P Mathur Supervisor and University of Delhi. Faculty of Medical Science. Department of Medicine. 1985. Clinical study of chronic obstructive pulmonary disease with special reference to spirometric measurements and arterial blood gas analysis. : .
                
                Harvard
                Gupta Umesh Kumar, University of Delhi. Faculty of Medical Science. Department of Medicine, Dr K P Mathur Supervisor and University of Delhi. Faculty of Medical Science. Department of Medicine. (1985). Clinical study of chronic obstructive pulmonary disease with special reference to spirometric measurements and arterial blood gas analysis. : .
                
                MLA
                Gupta Umesh Kumar, University of Delhi. Faculty of Medical Science. Department of Medicine, Dr K P Mathur Supervisor and University of Delhi. Faculty of Medical Science. Department of Medicine. Clinical study of chronic obstructive pulmonary disease with special reference to spirometric measurements and arterial blood gas analysis. : . 1985.