Citazione Stile APA (7a Edizione)

Amacher, R. C., & Ulbrich, H. H. (1995). Economic principles & policy (6th ed.). South-Western College.

Citazione stile Chigago Style (17a edizione)

Amacher, Ryan C., e Holley H. Ulbrich. Economic Principles & Policy. 6th ed. Cincinnati: South-Western College, 1995.

Citatione MLA (9a ed.)

Amacher, Ryan C., e Holley H. Ulbrich. Economic Principles & Policy. 6th ed. South-Western College, 1995.