Free, R. C. (2010). 21st century economics: A reference handbook. Sage.
Chicago Edition CitationFree, Rhona C. 21st Century Economics: A Reference Handbook. Los Angeles: Sage, 2010.
Cita MLAFree, Rhona C. 21st Century Economics: A Reference Handbook. Sage, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.