Cita APA (7a ed.)

O'Sullivan, A., & Sheffrin, S. M. (2001). Economics: Principles and tools (2nd ed.). Prentice Hall.

Cita Chicago Style (17a ed.)

O'Sullivan, Arthur, y Steven M. Sheffrin. Economics: Principles and Tools. 2nd ed. Upper Saddle River, New Jersey: Prentice Hall, 2001.

Cita MLA (9a ed.)

O'Sullivan, Arthur, y Steven M. Sheffrin. Economics: Principles and Tools. 2nd ed. Prentice Hall, 2001.