APA
Chhatwal G. R., . (1999). Encyclopaedia of environmental agricultural pollution and its control vol.1. New Delhi: Anmol publications Pvt.Ltd.
Chicago
Chhatwal G R, . 1999. Encyclopaedia of environmental agricultural pollution and its control vol.1. New Delhi: Anmol publications Pvt.Ltd.
Harvard
Chhatwal G. R., . (1999). Encyclopaedia of environmental agricultural pollution and its control vol.1. New Delhi: Anmol publications Pvt.Ltd.
MLA
Chhatwal G R, . Encyclopaedia of environmental agricultural pollution and its control vol.1. New Delhi: Anmol publications Pvt.Ltd. 1999.