Cita APA

O'Sullivan, A., & Sheffrin, S. M. (2006). Economics: Principles and tools (4th ed.). Pearson/Prentice Hall.

Citación estilo Chicago

O'Sullivan, Arthur, and Steven M. Sheffrin. Economics: Principles and Tools. 4th ed. Upper Saddle River, NJ: Pearson/Prentice Hall, 2006.

Cita MLA

O'Sullivan, Arthur, and Steven M. Sheffrin. Economics: Principles and Tools. 4th ed. Pearson/Prentice Hall, 2006.