National Conference on Indian Environment & Singh, P. (1992). Indian environment: Proceedings of National Conference organised by Institute of Environmental Sciences, "Chitrakut Gramoday Vishwavidyalay Chitrakut". Ashish Publishing.
Chicago-čujuhus (17. p.)National Conference on Indian Environment juo Parmod Singh. Indian Environment: Proceedings of National Conference Organised by Institute of Environmental Sciences, "Chitrakut Gramoday Vishwavidyalay Chitrakut". New Delhi: Ashish Publishing, 1992.
MLA-čujuhus (9. p.)National Conference on Indian Environment juo Parmod Singh. Indian Environment: Proceedings of National Conference Organised by Institute of Environmental Sciences, "Chitrakut Gramoday Vishwavidyalay Chitrakut". Ashish Publishing, 1992.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.