APA
Sachan N., Sachan N. S., . (20131990). Environment and health. New Delhi # Delhi: B.R. Publishing Corporation # Ashish Publishing House.
Chicago
Sachan Neeta.Singh, Sachan Neeta Singh, . 20131990. Environment and health. New Delhi # Delhi: B.R. Publishing Corporation # Ashish Publishing House.
Harvard
Sachan N., Sachan N. S., . (20131990). Environment and health. New Delhi # Delhi: B.R. Publishing Corporation # Ashish Publishing House.
MLA
Sachan Neeta.Singh, Sachan Neeta Singh, . Environment and health. New Delhi # Delhi: B.R. Publishing Corporation # Ashish Publishing House. 20131990.