Commentary:

Frank, Ellen; Miller, John; Scher, Abby; and the Dollars and Sense Collective. Real World Macro - A Macroeconomic Reader. 17 th Edition. Sommerville, MA.: Dollars and Sense, 2000. 

McConnell, Campbell, R. and Brue, Stanley L. Economics - Principles, Problems and Policies. 14 th Edition. Boston, MA.: Irwin McGraw-Hill. 1999.  

Shaikh, Anwar M., and Tonak, Ahmet E. Measuring the Wealth of Nations - The Political Economy of National Accounts. Cambridge, UK: Cambridge University Press, 1994.