Dyfyniad APA

 Lewis, H. (2007).  Are the rich necessary?: Great economic arguments and how they reflect our personal values.  Axios Press.

Dyfyniad Arddull Chicago

 Lewis, Hunter.  Are the Rich Necessary?: Great Economic Arguments and How They Reflect Our Personal Values.  Axios Press, 2007.

Dyfyniad MLA

 Lewis, Hunter.  Are the Rich Necessary?: Great Economic Arguments and How They Reflect Our Personal Values.  Axios Press, 2007.

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