Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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