Joseph, B. (2005). Environmental studies. Tata McGraw Hill.
Chicago-čujuhus (17. p.)Joseph, Benny. Environmental Studies. New Delhi: Tata McGraw Hill, 2005.
MLA-čujuhus (9. p.)Joseph, Benny. Environmental Studies. Tata McGraw Hill, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.