Krishnamoorthy, B. Environmental Management (2nd.).
Chicago-čujuhus (17. p.)Krishnamoorthy, Bala. Environmental Management. 2nd.
MLA-čujuhus (9. p.)Krishnamoorthy, Bala. Environmental Management. 2nd.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.