APA

Verma Arvind Kumar, University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology, Dr P K Manna Supervisor & University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology. (1997). Observation of hoarseness of voice after forty years of age. : .

Chicago

Verma Arvind Kumar, University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology, Dr P K Manna Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology. 1997. Observation of hoarseness of voice after forty years of age. : .

Harvard

Verma Arvind Kumar, University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology, Dr P K Manna Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology. (1997). Observation of hoarseness of voice after forty years of age. : .

MLA

Verma Arvind Kumar, University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology, Dr P K Manna Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Otorhinolaryngology. Observation of hoarseness of voice after forty years of age. : . 1997.