APA (7 ম সংস্করণ) উদ্ধৃতি

United Nations Environment Programme & UNEP. Global Environment Outlook 4: Evironment for development. GEO-4: evironment for development.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

United Nations Environment Programme এবং UNEP. Global Environment Outlook 4: Evironment for Development. GEO-4: Evironment for Development. UNEP. EARTHSCAN.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

United Nations Environment Programme এবং UNEP. Global Environment Outlook 4: Evironment for Development. GEO-4: Evironment for Development.