Gregory, P. R., & Stuart, R. C. (2004). Comparing economic systems in the twenty-first century (7th ed.). Houghton Mifflin Company.
Citace podle Chicago (17th ed.)Gregory, Paul R., a Robert C. Stuart. Comparing Economic Systems in the Twenty-first Century. 7th ed. Boston: Houghton Mifflin Company, 2004.
Citace podle MLA (9th ed.)Gregory, Paul R., a Robert C. Stuart. Comparing Economic Systems in the Twenty-first Century. 7th ed. Houghton Mifflin Company, 2004.
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