Cita APA (7a ed.)
Gracia, O., & Zuleta, O. (2009). The free trade agreement betwen Colombia and USA: What can happen to Colombia?
Cita Chicago Style (17a ed.)
Gracia, Orlando, y Orlando Zuleta. The Free Trade Agreement Betwen Colombia and USA: What Can Happen to Colombia? 2009.
Cita MLA (9a ed.)
Gracia, Orlando, y Orlando Zuleta. The Free Trade Agreement Betwen Colombia and USA: What Can Happen to Colombia? 2009.
Precaución: Estas citas no son 100% exactas.