APA

Harbans Singh, University of Delhi. Faculty of Medical Sciences. Department of Medicine, Dr Harmanjit Singh Hira Supervisor & University of Delhi. Faculty of Medical Sciences. Department of Medicine. (1989). Assessment of upper airway obstruction by pulmonary function tests. : .

Chicago

Harbans Singh, University of Delhi. Faculty of Medical Sciences. Department of Medicine, Dr Harmanjit Singh Hira Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Medicine. 1989. Assessment of upper airway obstruction by pulmonary function tests. : .

Harvard

Harbans Singh, University of Delhi. Faculty of Medical Sciences. Department of Medicine, Dr Harmanjit Singh Hira Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Medicine. (1989). Assessment of upper airway obstruction by pulmonary function tests. : .

MLA

Harbans Singh, University of Delhi. Faculty of Medical Sciences. Department of Medicine, Dr Harmanjit Singh Hira Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Medicine. Assessment of upper airway obstruction by pulmonary function tests. : . 1989.