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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)National Conference on Indian Environment và Parmod Singh. Indian Environment: Proceedings of National Conference Organised by Institute of Environmental Sciences, "Chitrakut Gramoday Vishwavidyalay Chitrakut". New Delhi: Ashish Publishing, 1992.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)National Conference on Indian Environment và Parmod Singh. Indian Environment: Proceedings of National Conference Organised by Institute of Environmental Sciences, "Chitrakut Gramoday Vishwavidyalay Chitrakut". Ashish Publishing, 1992.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.