APA (7th ed.) Citation
Amacher, R. C., & Ulbrich, H. H. (1989). Principles of Macroeconomics (4. ed.). South-Western Publ. Co.
Chicago Style (17th ed.) Citation
Amacher, Ryan C., and Holley H. Ulbrich. Principles of Macroeconomics. 4. ed. Cincinnati: South-Western Publ. Co, 1989.
MLA (9th ed.) Citation
Amacher, Ryan C., and Holley H. Ulbrich. Principles of Macroeconomics. 4. ed. South-Western Publ. Co, 1989.
Warning: These citations may not always be 100% accurate.