APA
Sarkar A., . (2015). Practical geography (rev edn), a. : Orient blackswan.
Chicago
Sarkar Ashis, . 2015. Practical geography (rev edn), a. : Orient blackswan.
Harvard
Sarkar A., . (2015). Practical geography (rev edn), a. : Orient blackswan.
MLA
Sarkar Ashis, . Practical geography (rev edn), a. : Orient blackswan. 2015.