Lean, G. (1990). Atlas of the environment. NewYork, US: Prentice Hall Press.
Trích dẫn kiểu ChicagoLean, Geoffrey. Atlas of the Environment. NewYork, US: Prentice Hall Press, 1990.
MLA CitationLean, Geoffrey. Atlas of the Environment. NewYork, US: Prentice Hall Press, 1990.
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