United Nations Environment Programme. (2002). South Asia, state of the environment, 2002: The youth version. United Nations Environment Programme : Distributed by United Nations Environment Programme, Regional Resource Centre for Asia and the Pacific.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited Nations Environment Programme. South Asia, State of the Environment, 2002: The Youth Version. Pathumthani, Thailand: United Nations Environment Programme : Distributed by United Nations Environment Programme, Regional Resource Centre for Asia and the Pacific, 2002.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিUnited Nations Environment Programme. South Asia, State of the Environment, 2002: The Youth Version. United Nations Environment Programme : Distributed by United Nations Environment Programme, Regional Resource Centre for Asia and the Pacific, 2002.