Dyfyniad APA

BUTLIN, J. Economics of environmental and natural resource policy#J.A. Butlin. Westiview Press.

Dyfyniad Arddull Chicago

BUTLIN, J.A. Economics of Environmental and Natural Resource Policy#J.A. Butlin. Westiview Press.

Dyfyniad MLA

BUTLIN, J.A. Economics of Environmental and Natural Resource Policy#J.A. Butlin. Westiview Press.

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