APA
Singh U., . (1999). Human ecology and development in india. New Delhi: APH Publishing Corporation.
Chicago
Singh Udai,pratap, . 1999. Human ecology and development in india. New Delhi: APH Publishing Corporation.
Harvard
Singh U., . (1999). Human ecology and development in india. New Delhi: APH Publishing Corporation.
MLA
Singh Udai,pratap, . Human ecology and development in india. New Delhi: APH Publishing Corporation. 1999.