Dyfyniad APA

Petts, J. (1999). Handbook of environmental impact assessment. Blackwell Science.

Dyfyniad Arddull Chicago

Petts, Judith. Handbook of Environmental Impact Assessment. Oxford: Blackwell Science, 1999.

Dyfyniad MLA

Petts, Judith. Handbook of Environmental Impact Assessment. Blackwell Science, 1999.

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