APA (7 ম সংস্করণ) উদ্ধৃতি

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.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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.