Caldwell, L. K. (1991). International environmental policy: Emergence and dimensions (2nd ed.). East-West Press.
Trích dẫn kiểu ChicagoCaldwell, Lynton Keith. International Environmental Policy: Emergence and Dimensions. 2nd ed. New Delhi: East-West Press, 1991.
Trích dẫn MLACaldwell, Lynton Keith. International Environmental Policy: Emergence and Dimensions. 2nd ed. East-West Press, 1991.
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