United Nations. Economic and Social Commission for Western Asia. (2001). Development of guidelines for harmonized environmental impact assessment suitable for the ESCWA region. United Nations.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited Nations. Economic and Social Commission for Western Asia. Development of Guidelines for Harmonized Environmental Impact Assessment Suitable for the ESCWA Region. New York: United Nations, 2001.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited Nations. Economic and Social Commission for Western Asia. Development of Guidelines for Harmonized Environmental Impact Assessment Suitable for the ESCWA Region. United Nations, 2001.
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