Cita APA (7a ed.)

Nicholls, A., & Opal, C. (2005). Fair trade: Market-driven ethical consumption. SAGE.

Cita Chicago Style (17a ed.)

Nicholls, Alex, y Charlotte Opal. Fair Trade: Market-driven Ethical Consumption. London ; Thousand Oaks, CA: SAGE, 2005.

Cita MLA (9a ed.)

Nicholls, Alex, y Charlotte Opal. Fair Trade: Market-driven Ethical Consumption. SAGE, 2005.