Cita APA (7th ed.)

Valdes, A., Ramos, H., & Schaeffer, B. (1996). Surveillance of agricultural price and trade policies: A handbook for Ecuador. World Bank.

Cita Chicago (17th ed.)

Valdes, Alberto, Hugo Ramos, i Barry Schaeffer. Surveillance of Agricultural Price and Trade Policies: A Handbook for Ecuador. Washington, D.C: World Bank, 1996.

Cita MLA (9th ed.)

Valdes, Alberto, et al. Surveillance of Agricultural Price and Trade Policies: A Handbook for Ecuador. World Bank, 1996.