Cita APA

Amacher, R. C., & Ulbrich, H. H. (1989). Principles of economics South-Western Pub. Co..

Citación estilo Chicago

Amacher, Ryan C., and Holley H. Ulbrich. Principles of Economics. 4th ed. Cincinnati: South-Western Pub. Co., 1989.

Cita MLA

Amacher, Ryan C., and Holley H. Ulbrich. Principles of Economics. 4th ed. Cincinnati: South-Western Pub. Co., 1989.