Das, K. (2009). Sustainable development. Reference Press.
Chicago-čujuhus (17. p.)Das, Kumar. Sustainable Development. New Delhi: Reference Press, 2009.
MLA-čujuhus (9. p.)Das, Kumar. Sustainable Development. Reference Press, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.