Cita APA (7th ed.)

Gregory, P. R., & Stuart, R. C. (2004). Comparing economic systems in the twenty-first century (7th ed.). Houghton Mifflin Company.

Cita Chicago (17th ed.)

Gregory, Paul R., i Robert C. Stuart. Comparing Economic Systems in the Twenty-first Century. 7th ed. Boston: Houghton Mifflin Company, 2004.

Cita MLA (9th ed.)

Gregory, Paul R., i Robert C. Stuart. Comparing Economic Systems in the Twenty-first Century. 7th ed. Houghton Mifflin Company, 2004.