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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি.Cullingworth, J. B. Energy, Land, and Public Policy. New Brunswick, U.S.A.: Transaction Publishers, 1990.
M.L.A (9 ম সংস্করণ) উদ্ধৃতি.Cullingworth, J. B. Energy, Land, and Public Policy. Transaction Publishers, 1990.