Joshi P.C. Text Book Of Environmental Science. APH Publishing.
Chicago-čujuhus (17. p.)Joshi P.C. Text Book Of Environmental Science. New Delhi: APH Publishing.
MLA-čujuhus (9. p.)Joshi P.C. Text Book Of Environmental Science. APH Publishing.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.