Gemma, Will. "The 4 Types of Economic Systems

       Explained." Udemy Blog. 19 May 2014. Wed. 26

       Feb. 2016

Amadeo, Kimberly. “Command Economy:  Characteristics, Pros,

Cons, and Examples.” About.com. 02 Dec. 2015. Web.

26 Feb. 2016.

Lapsansky-Werner, Emma J., Roberts, Randy, Levy, Peter B., and

    Alan Taylor. United States History:  Reconstruction to the

          Present. Upper Saddle River:  Pearson/Prentice Hall, 2008.

          Print.

Altmeyer, Arthur. "Social Welfare In The United

     States."  Social Security History. n.d. Web. 8 Mar

     2016

Peters, Gerthard. "Statement by the President Upton

       Signing the Communist Control Act of 1954."

       presidency. The American Presidency Project, 24

       Aug. 1954. Web. 9Mar. 2016

Goodwin, Doris. "The Way We Won: America's Economic

       Breakthrough During World War II." ClarionLegend.

       1 Aug 1992