Cita APA (7th ed.)
Gardner, H. S. (1998). Comparative economic systems. Dryden press.
Cita Chicago (17th ed.)
Gardner, H. Stephen. Comparative Economic Systems. Chicago: Dryden press, 1998.
Cita MLA (9th ed.)
Gardner, H. Stephen. Comparative Economic Systems. Dryden press, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.