India. Department of Environment. Environmental Information System (ENVIS). (1984). Directory of non-governmental organisations in environment. Environmental Information System (ENVIS), Department of Environment, Government of India.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)India. Department of Environment. Environmental Information System (ENVIS). Directory of Non-governmental Organisations in Environment. New Delhi: Environmental Information System (ENVIS), Department of Environment, Government of India, 1984.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)India. Department of Environment. Environmental Information System (ENVIS). Directory of Non-governmental Organisations in Environment. Environmental Information System (ENVIS), Department of Environment, Government of India, 1984.
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