SAMPSON, R. J. (1983). The American Economy Analysis Issues Principles Roy J. Sampson And Ira Marienhoff. Houghton Mifflin Company.
Chicago-referens (17:e uppl.)SAMPSON, Roy J. The American Economy Analysis Issues Principles Roy J. Sampson And Ira Marienhoff. Houghton Mifflin Company, 1983.
MLA-referens (8:e uppl.)SAMPSON, Roy J. The American Economy Analysis Issues Principles Roy J. Sampson And Ira Marienhoff. Houghton Mifflin Company, 1983.
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