Sarkar, D. N. (2009). Environmental Studies F.Y.B.Com (1st edn.). Himalaya Publishing House.
Chicago-čujuhus (17. p.)Sarkar, D. N. Environmental Studies F.Y.B.Com. 1st edn. Mumbai: Himalaya Publishing House, 2009.
MLA-čujuhus (9. p.)Sarkar, D. N. Environmental Studies F.Y.B.Com. 1st edn. Himalaya Publishing House, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.