National Environmental Engineering Research Institute. (1990). NEERI 1996. National Environmental Engineering Research Institute.
Chicago-čujuhus (17. p.)National Environmental Engineering Research Institute. NEERI 1996. Nagpur: National Environmental Engineering Research Institute, 1990.
MLA-čujuhus (9. p.)National Environmental Engineering Research Institute. NEERI 1996. National Environmental Engineering Research Institute, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.