Amacher, R. C., & Ulbrich, H. H. (1989). Principles of macroeconomics (Fourth edition.). South-Western Publishing Co.
Cita Chicago Style (17a ed.)Amacher, Ryan C., y Holley H. Ulbrich. Principles of Macroeconomics. Fourth edition. Cincinnati, Ohio: South-Western Publishing Co, 1989.
Cita MLA (9a ed.)Amacher, Ryan C., y Holley H. Ulbrich. Principles of Macroeconomics. Fourth edition. South-Western Publishing Co, 1989.
Precaución: Estas citas no son 100% exactas.