Commonwealth Secretariat. Economic Affairs Division. (1991). Sustainable development: An imperative for environmental protection : report by a group of experts on environmental concerns and the Commonwealth. Economic Affairs Division, Commonwealth Secretariat.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCommonwealth Secretariat. Economic Affairs Division. Sustainable Development: An Imperative for Environmental Protection : Report by a Group of Experts on Environmental Concerns and the Commonwealth. London: Economic Affairs Division, Commonwealth Secretariat, 1991.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিCommonwealth Secretariat. Economic Affairs Division. Sustainable Development: An Imperative for Environmental Protection : Report by a Group of Experts on Environmental Concerns and the Commonwealth. Economic Affairs Division, Commonwealth Secretariat, 1991.