Cita APA (7a ed.)

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.