Gregory, P. R. (1999). Comparative economic systems. Houghton Mifflin.
Cita Chicago Style (17a ed.)Gregory, Paul R. Comparative Economic Systems. Houghton Mifflin, 1999.
Cita MLA (8a ed.)Gregory, Paul R. Comparative Economic Systems. Houghton Mifflin, 1999.
Precaución: Estas citas no son 100% exactas.