Sarkar, S. (2014). A textbook of environmental studies. Mangalam Publisher.
Chicago-čujuhus (17. p.)Sarkar, Sukanta. A Textbook of Environmental Studies. Delhi: Mangalam Publisher, 2014.
MLA-čujuhus (9. p.)Sarkar, Sukanta. A Textbook of Environmental Studies. Mangalam Publisher, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.