Dyfyniad APA

Butler, J. H. (1980). Economic Geography: Spatial and environmen-tal aspects of economic activity. John Wiley.

Dyfyniad Arddull Chicago

Butler, Joseph H. Economic Geography: Spatial and Environmen-tal Aspects of Economic Activity. New York: John Wiley, 1980.

Dyfyniad MLA

Butler, Joseph H. Economic Geography: Spatial and Environmen-tal Aspects of Economic Activity. John Wiley, 1980.

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