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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United 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.