KRISHNAMOORTHY BALA. (2000). ENVIRONMENTAL MANAGEMENT.
Chicago-čujuhus (17. p.)KRISHNAMOORTHY BALA. ENVIRONMENTAL MANAGEMENT. MUMBAI, 2000.
MLA-čujuhus (9. p.)KRISHNAMOORTHY BALA. ENVIRONMENTAL MANAGEMENT. 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.