Nag, P. (1997). Geography and environment Vol -2 Resanal isue. Concept Pub. House.
Chicago-čujuhus (17. p.)Nag, Prithvish. Geography and Environment Vol -2 Resanal Isue. New delhi: Concept Pub. House, 1997.
MLA-čujuhus (9. p.)Nag, Prithvish. Geography and Environment Vol -2 Resanal Isue. Concept Pub. House, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.