Citazione Stile APA (7a Edizione)

Arnold, R. A. (2014). Economics (11th ed.). South-Western Cengage Learning.

Citazione stile Chigago Style (17a edizione)

Arnold, Roger A. Economics. 11th ed. Mason, OH: South-Western Cengage Learning, 2014.

Citatione MLA (9a ed.)

Arnold, Roger A. Economics. 11th ed. South-Western Cengage Learning, 2014.