APA aipamena

Free, R. C. (2010). 21st century economics: A reference handbook. Sage.

Chicago Style aipamena

Free, Rhona C. 21st Century Economics: A Reference Handbook. Los Angeles: Sage, 2010.

MLA aipamena

Free, Rhona C. 21st Century Economics: A Reference Handbook. Sage, 2010.

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