Cita APA (7th ed.)

O'Sullivan, A. (1998). Economics: Principles and tools. Pearson Prentice-Hall.

Cita Chicago (17th ed.)

O'Sullivan, Arthur. Economics: Principles and Tools. Upper Saddle River, New Jersey: Pearson Prentice-Hall, 1998.

Cita MLA (9th ed.)

O'Sullivan, Arthur. Economics: Principles and Tools. Pearson Prentice-Hall, 1998.