Gaya APA
Ashworth, W., Little, C, E. (2008).
The encyclopedia of environmental studies (1 st Indian edition).
New Delhi:
Viva Books Private Limited.
Gaya MLA
Ashworth, William., Little, Charles, E..
"The encyclopedia of environmental studies".
1 st Indian edition
New Delhi:
Viva Books Private Limited,
2008.
Text.